A.A. v. B.B.. ( 2016 )


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  •       ***FOR PUBLICATION IN WEST’S HAWAIʻI REPORTS AND PACIFIC REPORTER***
    Electronically Filed
    Supreme Court
    SCAP-15-0000022
    03-NOV-2016
    10:35 AM
    IN THE SUPREME COURT OF THE STATE OF HAWAIʻI
    ---o0o---
    A.A.,
    Petitioner/Petitioner-Appellant,
    vs.
    B.B.,
    Respondent/Respondent-Appellee.
    SCAP-15-0000022
    APPEAL FROM THE FAMILY COURT OF THE THIRD CIRCUIT
    (CAAP-15-0000022; FC-M NO. 14-1-0034K)
    NOVEMBER 3, 2016
    RECKTENWALD, C.J., NAKAYAMA, McKENNA, POLLACK, AND WILSON, JJ.
    OPINION OF THE COURT BY POLLACK, J.
    Petitioner A.A. and Respondent B.B. decided together
    to bring a child into their home.           Although only B.B. legally
    adopted the child, A.A. and B.B. co-parented the child and
    shared physical custody of her, even after their separation as a
    couple.    A.A. brought a petition for joint custody in the Family
    Court of the Third Circuit (family court) based solely on the de
    facto custody provision of Hawaiʻi Revised Statutes (HRS) § 571-
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    46(a)(2), which was denied.        A.A. appealed the family court’s
    denial of his petition and applied for a transfer to this court,
    which we granted.
    The main issue on appeal concerns the interpretation
    and application of Hawaii’s statutory de facto custody provision
    and whether it infringes on B.B.’s parental rights.             Because we
    conclude that the family court misinterpreted and misapplied the
    de facto custody provision, we vacate the family court’s
    decision and remand the case for further proceedings.
    I. BACKGROUND
    A. Factual Background
    A.A. and B.B. entered into a committed relationship in
    March 2009 and lived together continuously until October 2013.
    Child was born in September 2011, and B.B. is the biological
    grandfather and legal adoptive father of Child.
    The decision to adopt and raise Child was a joint
    decision made by B.B. and A.A.        Together they determined a first
    and last name for the baby, giving her each of their last names
    separated by a hyphen.       A.A., B.B., Child, and B.B.’s teenage
    son lived together as a family unit from October 2011 until
    October 2013.     During this time, A.A. and B.B. jointly shared
    all parental care, duties, and responsibilities for Child.              From
    the time she could talk, Child referred to B.B. as “Papa” and
    A.A. as “Daddy.”     A.A. and B.B. discussed and intended that A.A.
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    would adopt Child, and they retained an attorney to accomplish
    the adoption.                            However, A.A.’s planned adoption of Child never
    occurred, and although A.A. and B.B. discussed entering into a
    civil union or marriage, that also never occurred.
    After their separation in October 2013, B.B. and A.A.
    entered into a written 50/50 co-parenting agreement for Child.
    Under the co-parenting agreement, A.A. and B.B. each had actual
    care and custody of Child from Sunday to Wednesday and then
    Sunday to Thursday in alternating weeks.                                   During the period of
    the co-parenting agreement, A.A. and B.B. communicated through
    email to discuss Child.                                    B.B. indicated to A.A. by email that he
    wanted A.A. to have custody of Child should anything ever happen
    to him.                 In April 2014, B.B. sent A.A. a letter declaring that
    the written 50/50 co-parenting agreement was revoked on the
    ground that it was B.B.’s “parental right” to do so.
    B. A.A.’s Petition for Joint Custody
    A.A. filed a petition for joint custody in the family
    court in May 2014, seeking joint legal and joint 50/50 actual
    physical custody of Child pursuant to HRS § 571-46(a)(2).1
    1
    HRS § 571-46(a)(2) (Supp. 2013) provides,
    (a) . . . . In awarding the custody, the court shall be
    guided by the following standards, considerations, and
    procedures:
    . . . .
    (continued . . .)
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    A.A.’s petition alleged that he had de facto joint custody of
    Child “in a stable and wholesome home” and that he was “a fit
    and proper person to have care, custody, and control of the
    minor child.”
    The family court held an initial hearing on A.A.’s
    petition for joint custody in June 2014.2                                                                           At the June hearing,
    the court noted that there were no disputed facts in the case
    and that the issue was whether B.B. has the absolute right to
    dictate who can have custody of the minor child.
    During the evidentiary hearing held in October, B.B.
    offered Dr. Jennifer L. De Costa as “an expert in the field of
    family behaviors and in the relationship of children with their
    families.”3                       A.A. objected to Dr. De Costa’s qualification as an
    expert, asserting that she should be qualified as a marriage and
    family counselor; the family court concluded that Dr. De Costa
    (2) Custody may be awarded to persons other than the
    father or mother whenever the award serves the best
    interest of the child. Any person who has had de facto
    custody of the child in a stable and wholesome home and is
    a fit and proper person shall be entitled prima facie to
    an award of custody . . . .
    2
    The Honorable Melvin H. Fujino presided.
    3
    Dr. De Costa testified that she was a behavior health specialist
    at Innovative Hawaiʻi Community Hospital and possessed a bachelor’s degree in
    psychology from the University of Hawaiʻi, a master’s degree in science from
    Western Washington University, a master’s degree in marriage and family
    therapy from University of Oregon, and a doctorate degree from Oregon State
    University	in family counseling and gerontology.
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    was an expert in the field of family behavior and relationships
    as it relates to children and families.
    On direct examination, Dr. De Costa testified
    extensively about B.B.’s teenage son.                                   Dr. De Costa was
    permitted to testify over A.A.’s objection that she saw a
    correlation between depressive symptoms exhibited by B.B.’s son
    and interactions with A.A.; she discussed this correlation in
    reference to B.B.’s son’s performance on tests used to measure
    depression and anxiety.                                    Dr. De Costa also testified regarding
    her counseling and treatment of Child.                                   B.B.’s counsel requested
    Dr. De Costa to assume that A.A. had an anger management problem
    and asked her to offer an opinion as to whether she would have
    any concerns of Child having a custodial relationship with A.A.
    A.A. objected to the testimony on the basis that the
    hypothetical question assumed facts not in evidence.4                                   Dr. De
    Costa was permitted to opine that she would have concerns about
    Child having a relationship with A.A.                                   Dr. De Costa was also
    asked whether Child would be harmed from termination of the
    relationship with A.A.; she testified, “This is a hard one.                                      But
    I don’t--right now, where she’s at, I don’t think so.”
    4
    A.A. later testified that he had an anger management problem that
    interfered with his relationship with B.B..
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    A.A. offered Dr. Jamuna Wyss, a clinical psychologist,
    as an expert on parent-child psychological relationships and
    parenting styles.       Dr. Wyss indicated that A.A. and B.B.
    attended couples therapy with him beginning in October 2013 and
    that A.A. continued to be his client in individual therapy.               Dr.
    Wyss gave a favorable opinion regarding A.A. as a parent and the
    home he provided for Child.         Dr. Wyss also testified regarding
    the consequences when parent-child relationships are terminated,
    opining that there was a likelihood that termination of the
    relationship between A.A. and Child would result in “immediate-
    term and long-term damaging psychological consequences” to
    Child.
    A.A.’s counsel also attempted to enter into evidence a
    clinical note of Dr. Wyss’s related to sex-abuse allegations
    involving A.A.      The court did not accept the note into evidence
    and did not allow Dr. Wyss to testify regarding the allegation
    because it was outside the scope of Dr. Wyss’s report.              However,
    Dr. Wyss was permitted to testify that he was aware of sex-abuse
    allegations involving A.A. and that he did not believe that A.A.
    posed a threat of abuse to Child, “be it sexual, physical, or
    emotional abuse or neglect.”
    On December 11, 2014, the family court entered its
    “Findings of Fact, Conclusions of Law; Order/Final Judgment”
    denying A.A.’s petition for joint custody.            The family court
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    characterized the main issue as follows: “[I]n a State where the
    parties can get married or can become a civil union partnership,
    if they choose not to, . . . should [A.A.] be afforded standing
    to claim what is known as a ‘psychological father.’”                           The court
    concluded that A.A. did not have standing as Child’s
    “psychological father” because the parties were not married.
    Although the family court determined that HRS § 571-46 applied,
    which allows a custody award to a person who demonstrates de
    facto custody of a child, the court concluded that A.A. failed
    to demonstrate “by strict scrutiny a compelling state interest
    as to why this ‘de facto’ section should apply to him when in
    fact the parties were not married, and when the options of civil
    union or marriage were available.”5
    II. DISCUSSION
    A.A.’s petition requested joint custody of Child
    pursuant to HRS § 571-46(a)(2), asserting that A.A. “is a person
    who has had de facto joint custody of the child in a stable and
    wholesome home” and that joint custody was in the best interests
    of Child.6                      Although the family court determined that HRS § 571-
    5
    The family court also found, “In this case the Court will find
    compelling               the testimony of the child’s therapist, Jennifer De Costa, in the
    sense that               she testified that in her opinion that the child would not be
    harmed and               in fact that she did see some regression once the Court allowed
    supervised               visitation between [Child and A.A.].”
    6
    A.A. sought custody of Child based solely on the de facto
    provision of HRS § 571-46(a)(2). Additionally, in his opening brief, A.A.
    (continued . . .)
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    46(a)(2) was applicable, the court declined to apply this
    statutory provision, reasoning that A.A. failed to demonstrate
    “by strict scrutiny a compelling state interest” to support the
    application of the statute under the circumstances of this case.
    Thus, the primary issues on appeal are whether the family court
    properly interpreted and applied HRS § 571-46(a)(2) and whether
    its application in this case would infringe on B.B.’s
    constitutionally protected parental rights.                                                                                A.A. also
    challenges several evidentiary rulings regarding the expert
    testimony presented at the hearing.
    A. Interpretation and Application of HRS § 571-46(a)(2)
    In cases involving child custody, it is well
    established that the guiding consideration is the best interests
    of the child.                            E.g., Doe v. Doe, 98 Hawaiʻi 144, 155, 
    44 P.3d 1085
    , 1096 (2002); Fujikane v. Fujikane, 
    61 Haw. 352
    , 354, 604
    cites only to HRS § 571-46(a)(2)--and not HRS § 571-46(a)(1)--as a basis for
    his claim for custody of Child. Although A.A. references the “parent by
    estoppel” doctrine of other jurisdictions in his opening brief, he does so in
    support of his argument that the trial court erred in its determination that
    A.A. was required to show by strict scrutiny a compelling state interest as
    to why HRS § 571-46(a)(2) should apply to him. Thus, it appears that to the
    extent that A.A. argues that he satisfies the doctrine adopted by the
    Wisconsin Supreme Court, it is to support his argument that the application
    of this statute is constitutional.
    Accordingly, we do not consider whether A.A. is a “parent”
    eligible to seek custody pursuant to HRS § 571-46(a)(1) or on any other
    basis. It is noted that at least one jurisdiction has expanded the
    definition of “parent” in a similar statute to include a partner of a
    domestic partnership that agrees to conceive a child and to raise the child
    together. See Brooke S.B. v. Elizabeth A. C.C., No. 91, 
    2016 WL 4507780
    (N.Y. Aug. 30, 2016).
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    P.2d 43, 45 (1979) (per curiam).          The trial court possesses
    broad discretion in making custody decisions and in its
    determination of what is in the best interests of the child.
    Fujikane, 61 Haw. at 354, 604 P.2d at 45 (“It is clear that the
    court below possesses wide discretion in making custody
    decisions . . . .”).      HRS § 571-46(a) provides standards that
    apply to a court’s custody decision in proceedings involving a
    dispute as to the custody of a minor child:
    In awarding the custody, the court shall be guided by the
    following standards, considerations, and procedures:
    (1) Custody should be awarded to either parent or to both
    parents according to the best interests of the child, and
    the court also may consider frequent, continuing, and
    meaningful contact of each parent with the child unless
    the court finds that a parent is unable to act in the best
    interest of the child;
    (2) Custody may be awarded to persons other than the
    father or mother whenever the award serves the best
    interest of the child. Any person who has had de facto
    custody of the child in a stable and wholesome home and is
    a fit and proper person shall be entitled prima facie to
    an award of custody;
    (3) If a child is of sufficient age and capacity to
    reason, so as to form an intelligent preference, the
    child’s wishes as to custody shall be considered and be
    given due weight by the court . . . .
    HRS § 571-46(a)(1)-(3) (Supp. 2013).
    Subsection (a)(1) of this statute concerns the
    awarding of custody to the child’s parents and provides that
    custody “should be awarded” to either or both parents according
    to the best interests of the child.         Additionally, the court may
    consider continuing and meaningful contact of each parent with
    the child unless the parent is unable to act in the best
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    interests of the child.7                                    In his petition for custody, A.A. does
    not seek custody based on alleged parental status under
    subsection (a)(1).
    Subsection (a)(2), upon which A.A. relies, provides
    that custody “may be awarded to persons other than the father or
    mother whenever the award serves the best interest of the
    child.”                 Subsection (a)(2) also creates a presumption in favor
    of a person under certain circumstances: “Any person who has had
    de facto custody of the child in a stable and wholesome home and
    is a fit and proper person shall be entitled prima facie to an
    award of custody.”                                     Although “de facto custody” is not defined,
    we interpret it to mean sole or shared physical custody in
    combination with an assumption of incidents of legal custody
    enumerated in HRS § 571-2, which include “the duty to protect,
    train, and discipline the minor and to provide the minor with
    food, shelter, education, and ordinary medical care.”                                    In other
    words, de facto custody is consistent with a parental role.
    Accordingly, a person may establish a prima facie case
    of de facto custody, by showing that the person (1) is a fit and
    proper person (2) who has had de facto custody of the child (3)
    7
    “‘Meaningful contact’ means parent and child interactions,
    activities, and experiences, performed together, which nurture the parent-
    child attachment and relationship, while contributing to the child’s
    development in a positive and effective manner.” HRS § 571-2 (2006 & Supp.
    2011).
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    in a stable and wholesome home.                             HRS § 571-46(a)(2).   If a
    person is able to establish these three elements, then the
    person has adduced prima facie evidence that awarding custody to
    that person is in the best interests of the child.                            Nonetheless,
    the family court ultimately has the discretion to determine the
    custody award that would serve the best interests of the child
    based on the entirety of the evidence presented.
    Although the family court determined that HRS § 571-
    46(a)(2) applies to this case, the court did not determine
    whether or not A.A. established a prima facie case to an award
    of custody based on de facto custody.8                            However, the family court
    did not make any particular findings that would contradict
    A.A.’s claim of de facto custody pursuant to subsection (a)(2),
    and A.A. provided evidence to support all three elements of
    subsection (a)(2) in addition to evidence from Dr. Wyss that it
    would be beneficial to Child to have contact with him.                             On the
    8
    Although we express no opinion as to whether A.A. established
    prima facie that he had de facto custody of child pursuant to HRS § 571-
    46(a)(2), it is noted that the record was sufficient to support a finding
    that A.A. had de facto custody of Child because B.B. shared all parental
    care, duties, and responsibilities with respect to Child with A.A. from
    October 2011 to October 2013 and then continued to have actual joint custody
    of Child until April 2014, pursuant to the written co-parenting agreement.
    The family court’s findings would also support a determination that A.A.
    provided a stable and loving home for Child, based on, inter alia, the
    court’s findings regarding the period of joint custody and Dr. Wyss’s
    testimony that termination of the attachment bond between A.A. and Child
    would be psychologically harmful to Child. The findings that would support
    the first two elements may also support a finding that A.A. was a fit and
    proper person to have custody of Child given that he was involved in co-
    parenting Child for the majority of Child’s life.
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    other hand, B.B. produced evidence, including through Dr. De
    Costa’s testimony, that could be construed to support a finding
    that A.A. is not a fit and proper person and that it would not
    be in Child’s best interests for custody to be jointly awarded
    to A.A.
    In declining to apply subsection (a)(2), the family
    court reasoned that A.A. did not adequately demonstrate by
    strict scrutiny a compelling state interest that the statute was
    constitutional as applied to him.9                              The burden, however, is not
    on A.A. to demonstrate the constitutionality of HRS § 571-
    46(a)(2).                     Indeed, “every enactment of the legislature is
    presumptively constitutional,” and the “party challenging the
    statute has the burden of showing unconstitutionality.”                              State
    v. Mueller, 
    66 Haw. 616
    , 627, 
    671 P.2d 1351
    , 1358 (1983)
    (quoting Schwab v. Ariyoshi, 
    58 Haw. 25
    , 31, 
    564 P.2d 135
    , 139
    (1977)).                   Thus, in this case, if joint custody were awarded to
    A.A., then B.B. would be considered the challenger to HRS § 571-
    46(a)(2), and B.B. would have the burden of establishing the
    statute’s infringement on his constitutionally protected
    parental rights.                                 Id.
    9
    We review the family court’s conclusions of law, including
    constitutional questions of law, de novo under the right/wrong standard. See
    Doe v. Doe, 116 Hawaiʻi 323, 326, 
    172 P.3d 1067
    , 1070 (2007); In re Doe, 95
    Hawaiʻi 183, 190, 
    20 P.3d 616
    , 623 (2001).
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    The family court’s analysis was directly contrary to
    this widely accepted presumption that statutes are valid.
    Accordingly, the family court erred in requiring that A.A.
    establish the constitutionality of HRS § 571-46(a)(2) before its
    application.     The family court should have made findings and
    conclusions with regard to whether A.A. satisfied the de facto
    custody test of subsection (a)(2) and whether granting of joint
    custody was in the best interests of Child.
    B.B. argues that HRS § 571-46 prefers that custody be
    awarded to the parents of a child and that a non-parent may only
    be considered for custody if the court finds that the parent is
    unable to act in the best interests of the child.            We do not
    agree with this rigid interpretation of HRS § 571-46, which is
    contrary to the well-settled principle that “the paramount
    consideration” in child custody cases is the best interests of
    the child.    Doe, 98 Hawaiʻi at 155, 
    44 P.3d 1085
     at 1096.           While
    a preference inheres in HRS § 571-46(a)(1) that custody “should”
    be awarded to the parents, nevertheless custody may be awarded
    to persons other than a parent and the court “shall” consider
    the child’s wishes if the child is of sufficient age and
    capacity to reason.      HRS § 571-46(a)(1)-(3).       Implicit in B.B.’s
    proffered interpretation is the concept that custody will be
    given either to a parent or nonparent.          However, in reality,
    there may be instances where the child’s best interests are
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    served by joint custody where a fit parent and nonparent share
    responsibilities for the child.
    The court must always determine what would serve the
    best interests of the child.        HRS § 571-46 provides guidance to
    the courts by way of standards, considerations, and procedures,
    and ultimately, the court has the flexibility to fashion a
    custody award that is in the best interests of the child.              In
    this case, the family court erred in concluding that A.A. was
    required to establish, as a threshold matter, that the
    application of HRS § 571-46(a)(2) to his claim for custody would
    be constitutional.      Because the court did not make a
    determination as to whether A.A. established a prima facie case
    of de facto custody under HRS § 571-46(a)(2) and did not make
    findings of fact and conclusions on this ultimate issue, the
    record is insufficient for appellate review of the custody
    decision.    Accordingly, the case must be remanded to the family
    court for further proceedings.
    B. B.B.’s Constitutionally Protected Parental Rights
    In his answering brief, B.B. argues that HRS § 571-
    46(a)(2) “is being utilized by [A.A.] to attempt to interfere
    with [B.B.’s] right to raise his child and protect his child
    from the conduct, belief, opinions, language, personality, and
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    demeanor of [A.A.].”10                                     In light of the remand of this case to
    the family court, we address B.B.’s constitutional challenge to
    HRS § 571-46(a)(2).11
    B.B.’s constitutional argument raises questions
    regarding whether HRS § 571-46(a)(2) unreasonably interferes
    with B.B.’s decision as a parent to no longer share custody with
    A.A..              Accordingly, we consider whether Hawaii’s de facto
    custody provision--which uses a “best interests of the child
    standard”--unconstitutionally infringes on a person’s parental
    rights where the nonparent has had actual custody of the child
    in a stable and wholesome home, is a fit and proper person, the
    parent has voluntarily incorporated the nonparent into the
    family unit sharing parental responsibilities and duties, and
    the parties subsequently shared custody pursuant to a written
    co-parenting agreement.
    The Fourteenth Amendment to the United States
    Constitution and article I, section 5 of the Hawaiʻi Constitution
    provide that no person shall be deprived of “life, liberty, or
    property without due process of law.”                                     U.S. Const. amend. XIV, §
    10
    The record does not indicate whether B.B. notified the Attorney
    General of the State of Hawaiʻi of his challenge to the constitutionality of
    HRS § 571-46(a)(2) pursuant to his duty under Hawaiʻi Rules of Appellate
    Procedure Rule 44.
    11
    For purposes of considering the constitutional issue raised by
    B.B., we assume that A.A. satisfies the de facto custody provision. However,
    as mentioned, we express no opinion as to whether A.A. satisfied the three
    elements necessary to raise the de facto presumption.
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    1; Haw. Const. art. I, § 5.        Under the Hawaiʻi Constitution, we
    conduct a two-step inquiry in analyzing procedural due process
    claims.    We first consider whether a liberty or property
    interest has been interfered with by the State, and second, we
    determine what specific procedures are required to satisfy due
    process.    State v. Guidry, 105 Hawaiʻi 222, 227, 
    96 P.3d 242
    , 247
    (2004).    Similarly, when the Due Process Clause “is invoked in a
    novel context,” the Supreme Court of the United States “begin[s]
    the inquiry with a determination of the precise nature of the
    private interest that is threatened by the State.”            Lehr v.
    Robertson, 
    463 U.S. 248
    , 256 (1983); see Washington v.
    Glucksberg, 
    521 U.S. 702
    , 720 (1997) (noting that the court has
    required “‘a careful description’ of the asserted fundamental
    liberty interest” (quoting Reno v. Flores, 
    507 U.S. 292
    , 301
    (1993))).    It is only after that interest has been identified
    that the court can “properly evaluate the adequacy of the
    State’s process.”      Lehr, 
    463 U.S. at 256
    .
    Whether a parent has a constitutionally protected
    liberty interest in deciding that a person who has “de facto
    custody” of the child should no longer have custody is a matter
    of first impression in this jurisdiction.           It has long been
    recognized that the due process clause protects certain liberty
    interests that parents have in maintaining relationships with
    their children and in directing their upbringing.            See, e.g.,
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    Troxel v. Granville, 
    530 U.S. 57
    , 65 (2000).           Independent of the
    United States Constitution, parents have a substantive liberty
    interest in the care, custody, and control of their children
    protected by the due process clause of article I, section 5 of
    the Hawaiʻi Constitution and the right to privacy of article I,
    section 6 of the Hawaiʻi Constitution.         See Doe v. Doe, 116
    Hawaiʻi 323, 334, 
    172 P.3d 1067
    , 1078 (2007) (“Parents’ right to
    raise their children is protected under article I, section 6 of
    the Hawaiʻi Constitution . . . .”); In re Doe, 99 Hawaiʻi 522,
    533, 
    57 P.3d 447
    , 458 (2002) (“We affirm, independent of the
    federal constitution, that parents have a substantive liberty
    interest in the care, custody, and control of their children
    protected by the due process clause of article 1, section 5 of
    the Hawaiʻi Constitution.”).
    Although due process jurisprudence recognizes a
    substantive liberty interest in directing the upbringing of
    one’s child without state interference, the right is largely
    undefined.    In Troxel v. Granville, the United States Supreme
    Court reviewed the Washington Supreme Court’s determination that
    a Washington visitation statute violated the United States
    Constitution.     A majority of the Court agreed to affirm the
    Washington Supreme Court’s decision.          The plurality opinion,
    written by Justice Sandra Day O’Connor, found that the
    Washington visitation statute was “breathtakingly broad” because
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    its language effectively permitted “any third party seeking
    visitation to subject any decision by a parent concerning
    visitation of the parent’s children to state-court review.”              
    530 U.S. at 67-68
    .     The plurality opinion did not define the scope
    of the parental right at issue in that case, and one common
    thread that runs through nearly all of the six opinions written
    in the Troxel case is that the parental right with respect to
    visitation decisions remained undefined.          See 
    id. at 73
     (“We do
    not, and need not, define today the precise scope of the
    parental due process right in the visitation context.”); 
    id. at 78
     (Souter, J., concurring) (“Our cases, it is true, have not
    set out exact metes and bounds to the protected interest of a
    parent in the relationship with his child . . . .”); 
    id. at 88
    (Stevens, J., dissenting) (“While this Court has not yet had
    occasion to elucidate the nature of a child’s liberty interests
    in preserving established familial or family-like bonds, it
    seems to me extremely likely that, to the extent parents and
    families have fundamental liberty interests in preserving such
    intimate relationships, so, too, do children have these
    interests, and so, too, must their interests be balanced in the
    equation.” (citation omitted)); 
    id. at 91-93
     (Scalia, J.,
    dissenting) (arguing that the constitution does not recognize
    the right of a parent to direct the upbringing of their children
    and indicating that he would not extend the theory of the cases
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    recognizing any such right “to this new context”); 
    id.
     at at
    100-01 (Kennedy, J., dissenting) (“In short, a fit parent’s
    right vis-à-vis a complete stranger is one thing; another parent
    or a de facto parent may be another.                            The protection the
    Constitution requires, then, must be elaborated with care, using
    discipline and instruction of the case law system.”).                           But see
    
    id.
     at (Thomas, J., dissenting) (arguing that “parents have a
    fundamental constitutional right to rear their children,
    including the right to determine who shall educate and socialize
    them”).                 Similarly, the scope of the parental right in the
    context of custody proceedings between a parent and a nonparent
    who has “de facto custody” of the child has not been defined by
    the Supreme Court.
    The Supreme Court’s cases regarding the interests of
    parents in the care, custody, and control of their children may
    be grouped into two categories: (1) cases involving a natural
    parent’s right to parent a child and maintain the parent-child
    relationship12 and (2) cases involving state interference with a
    12
    See Santosky v. Kramer, 
    455 U.S. 745
    , 768 (1982) (holding that a
    state’s use of a “fair preponderance of the evidence” standard at a parental
    rights termination proceeding violated the Due Process Clause); Quilloin v.
    Walcott, 
    434 U.S. 246
    , 255 (1978) (holding that the natural father’s
    substantive due process rights were not violated by application of the “best
    interests of the child” standard where natural father had not previously
    sought actual or legal custody of child); Stanley v. Illinois, 
    405 U.S. 645
    ,
    (1972) (holding that natural father “was entitled to a hearing on his fitness
    as a parent before his children were taken from him and that, by denying him
    a hearing and extending it to all other parents whose custody of their
    (continued . . .)
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    parent’s decision regarding the child.13                                                                         This case does not call
    into question the potential termination of B.B.’s parental
    rights, but rather, it involves B.B.’s right to determine who
    has custody and access to Child.                                                             Because the Court did not
    define the parental right in Troxel, there are no Supreme Court
    opinions discussing circumstances analogous to this case.                                                                                                        See
    supra notes 12-13.14
    children is challenged, the State denied [father] the equal protection of the
    laws guaranteed by the Fourteenth Amendment”).
    13
    See Troxel, 
    530 U.S. at 67-68
     (holding as facially
    unconstitutional a statute allowing any third party seeking visitation to
    subject any decision by a parent concerning visitation of the parent’s
    children to state-court review); Wisconsin v. Yoder, 
    406 U.S. 205
    , 234 (1972)
    (holding that the First and Fourteenth Amendments prevented the State of
    Wisconsin from compelling Amish parents to “cause their children to attend
    formal high school at age 16”); Prince v. Massachusetts, 
    321 U.S. 158
    , 443-44
    (1944) (holding that a state statute prohibiting children from distributing
    magazines on the street did not violate child’s First Amendment rights or
    child’s custodian’s First and Fourteenth Amendment rights to give child
    religious training); Pierce v. Soc’y of the Sisters, 
    268 U.S. 510
    , 535 (1925)
    (holding that a state statute requiring children to attend public school
    “unreasonably interfere[d] with the liberty of parents and guardians to
    direct the upbringing and education of children under their control”); see
    also Parham v. J. R., 
    442 U.S. 584
    , 603 (1979) (holding that a state statute,
    which allowed voluntary admission of minor children to mental hospitals by
    parents or guardians, did not per se violate the children’s substantive due
    process rights).
    14
    The Massachusetts Supreme Court observed that the following
    principles clearly emerged from the Troxel plurality decision:
    (i) reaffirmation that a parent’s liberty interest in child
    rearing is indeed fundamental, and is certainly fundamental
    in this context;
    (ii) “any third party” should not be permitted to seek
    visitation;
    (iii) in determining whether grandparent visitation should
    occur, there exists a “presumption that a fit parent will
    act in the best interest of his or her child,” and the
    decision of a fit parent concerning grandparent visitation
    is entitled to considerable deference; and
    (continued . . .)
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    In Doe, this court considered the constitutionality of
    a statute allowing for any grandparent residing in the same
    state of their grandchild to petition for visitation and
    allowing the court to grant the petition so long as it was in
    the best interests of the child.15                                                                 116 Hawaiʻi at 325, 
    172 P.3d at 1069
    .                   Applying strict scrutiny, the court concluded that
    “proper recognition of parental autonomy in child-rearing
    decisions requires that the party petitioning for visitation
    demonstrate that the child will suffer significant harm in the
    absence of visitation before the family court may consider what
    degree of visitation is in the child’s best interests.”                                                                                                     Id. at
    335-36, 
    172 P.3d at 1079-80
    .                                                      Accordingly, the court held that
    the statute was facially unconstitutional because it did not
    include the “harm to the child” standard required by the right
    to privacy under the Hawaiʻi Constitution.16                                                                              Id. at 336; 172 P.3d
    (iv) in determining whether grandparent visitation should
    occur, the potential impact to the parent-child
    relationship should be considered.
    Blixt v. Blixt, 
    774 N.E.2d 1052
    , 1058-59 (Mass. 2002) (citations omitted)
    (quoting Troxel, 
    530 U.S. at 67, 69
    ).
    15
    The court also suggested that the statute was not facially
    unconstitutional under the Due Process Clause of the Fourteenth Amendment.
    See Doe, 116 Hawaiʻi at 333, 
    172 P.3d at 1077
     (concluding that the grandparent
    visitation statute “comport[ed] with the limited requirements expressed in
    Troxel”).
    16
    Doe ruled that the statute was unconstitutional under article I,
    section 6 of the Hawaiʻi Constitution only. See 116 Hawaiʻi at 335-36, 
    172 P.3d at 1079-80
    .
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    at 1080.    Thus, a parent’s fundamental right to direct the
    upbringing of his or her child was implicated “where a nonparent
    third party petitione[d] for visitation,” and the State could
    not interfere with the parent’s decision absent a finding that
    the parent’s decision to deny access to the child would result
    in harm to the child.      
    Id.
    Subsequently, the ICA considered whether the
    application of the doctrine of equitable estoppel in a custody
    proceeding infringed on a mother’s parental rights.             See Inoue
    v. Inoue, 118 Hawaiʻi 86, 101, 
    185 P.3d 834
    , 849 (App.), cert.
    denied, 118 Hawaiʻi 194, 
    186 P.3d 629
     (2008).           In Inoue, the
    family court equitably estopped the biological mother of a child
    from denying that her husband was the father of her child for
    the purposes of determining custody.          Id. at 88, 
    185 P.3d at 836
    .    The mother and her husband in Inoue met when she was
    pregnant with the child.       Id. at 88-89, 
    185 P.3d at 836-37
    .         The
    mother did not identify any father on the child’s original birth
    certificate, but at some point after the birth of the child, the
    child’s birth certificate was changed to reflect the husband as
    the child’s father.      Id. at 89, 
    185 P.3d at 837
    .        The mother and
    husband were subsequently married, had two additional children,
    and lived together as a family until their separation seven
    years later.     
    Id.
       The family court in Inoue awarded husband
    sole legal and physical custody of all three children, while
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    granting mother visitation rights.          Id. at 91, 
    185 P.3d at 839
    .
    The mother appealed the family court’s decision to the ICA
    arguing that the family court could not award husband custody of
    the oldest child because he was not the child’s legal father and
    she was not unfit.       Id. at 92, 
    185 P.3d at 840
    .
    The ICA concluded that the family court did not err in
    holding that the husband was the legal father of the child under
    Hawaii’s presumption of paternity statute and that the mother
    was estopped from challenging her husband’s parentage of the
    child.    Id. at 94, 
    185 P.3d at 842
    .        The ICA also considered
    whether the application of the doctrine of equitable estoppel
    infringed on the mother’s parental rights under a plain error
    standard of review.       Id. at 99-101, 
    185 P.3d at 847-49
    .         The ICA
    concluded that the application of the doctrine of equitable
    estoppel did not infringe on the mother’s liberty interests
    because she voluntarily rendered her parental rights with
    respect to the child “less exclusive and less exclusory” with
    regard to her husband.        Id. at 101, 
    185 P.3d at 849
     (quoting
    Rubano v. DiCenzo, 
    759 A.2d 959
    , 976 (R.I. 2000)).             The ICA
    reasoned,
    By marrying Egan and then adding his name to Child One’s
    birth certificate, Gina created the circumstances under
    which Egan became Child One’s “legal father.” By
    representing to him that he had adopted Child One when he
    allowed his name to be added to the certificate, Gina led
    Egan to take no action to further investigate or establish
    his status as Child One’s father. Finally, Gina allowed
    Egan to assume the role of Child One’s father and to become
    Child One’s psychological parent.
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    Id. at 100-01, 
    185 P.3d at 848-49
     (footnote omitted).
    Inoue relied on the Rhode Island Supreme Court’s
    decision in Rubano, which concerned two women who agreed to
    become the parents of a child.        
    759 A.2d at 961
    .      They arranged
    for one of them to conceive via artificial insemination, and
    they raised the child together for four years while living
    together as a family in Massachusetts.          
    Id.
       They gave the child
    both of their last names separated by a hyphen on the child’s
    birth certificate and sent out printed birth announcements
    identifying both of them as the child’s parents, although the
    parental status was never legally settled by adoption.             
    Id.
    When the couple separated, the biological mother took the child
    with her to Rhode Island, and, initially, the biological mother
    agreed to a visitation schedule for her former partner to see
    the child.    
    Id. at 961
    .     Later, when the biological mother was
    resistant to the visitation arrangements, the former partner
    initiated legal proceedings seeking to establish her de facto
    parental status and obtain court-ordered visitation.             
    Id. at 961-62
    .   The parties negotiated a compromise that was embodied
    in a consent order, specifying that the former partner would
    have permanent visitation with the child on a periodic basis in
    exchange for waiving any claim to parent the child.             
    Id. at 962
    .
    In later proceedings, the biological mother asserted that the
    court lacked jurisdiction to enter the consent order.             
    Id.
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    The Supreme Court of Rhode Island considered whether
    the biological mother had a protected liberty interest under the
    Due Process Clause of the Fourteenth Amendment to terminate the
    relationship between her former partner and child.            The Rhode
    Island court concluded that the biological mother rendered her
    own parental rights with respect to her child “less exclusive
    and less exclusory” than they otherwise would have been had she
    not “by word and deed” allowed her former partner to establish a
    parental bond with the child and also agreed to allow
    visitation.    
    Id. at 976
    .     The court reasoned that “the mere fact
    of biological parenthood, even when coupled with the biological
    parent’s ongoing care and nurture of the child and that parent’s
    fundamental right . . . , does not always endow the biological
    parent with the absolute right to prevent all third parties from
    ever acquiring any parental rights vis-à-vis the child.”              
    Id.
    The Inoue and Rubano decisions are consistent with the
    United States Supreme Court’s cases defining the parental
    liberty interest.      Constitutionally protected parental rights
    are not based solely on legal or biological ties, and the
    Supreme Court has recognized “that the rights of the parents are
    a counterpart of the responsibilities they have assumed.”              Lehr,
    
    463 U.S. at 257
    .     Stated another way, “A parent’s rights with
    respect to her child have thus never been regarded as absolute,
    but rather are limited by the existence of an actual, developed
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    relationship with a child, and are tied to the presence or
    absence of some embodiment of family.”          Troxel, 
    530 U.S. at 88
    (Stevens, J., dissenting).       The Supreme Court has recognized
    that “[t]he importance of the familial relationship, to the
    individuals involved and to the society, stems from the
    emotional attachments that derive from the intimacy of daily
    association, and from the role it plays in ‘promot[ing] a way of
    life’ through the instruction of children as well as from the
    fact of blood relationship.’”        Lehr, 
    463 U.S. at 261
     (second
    alteration in original) (quoting Smith v. Org. of Foster
    Families for Equality & Reform, 
    431 U.S. 816
    , 844 (1977)); see
    also Quilloin v. Walcott, 
    434 U.S. 246
    , 255 (1978) (holding that
    “best interests of the child standard” did not violate a natural
    father’s parental rights in adoption proceedings that terminated
    his parental rights where natural father did not marry the
    mother and had not at any time sought actual or legal custody of
    his child).
    The scope of parental rights is also defined in
    reference to the State’s authority and duty to protect children
    in addition to the rights of children.          See Troxel, 
    530 U.S. at 88
     (Stevens, J., dissenting) (observing that limitations on
    parental rights “have arisen, not simply out of the definition
    of parenthood itself, but because of [the Supreme Court’s]
    assumption that a parent’s interests in a child must be balanced
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    against the State’s long-recognized interests as parens patriae
    and, critically, the child’s own complementary interest in
    preserving relationships that serve her welfare and protection”
    (citations omitted)).      Indeed, with regard to the Troxel
    decision, a majority of the court contemplated that even where
    the parent has a developed, legal parent-child relationship with
    the child, there may be special factors that justify state
    interference.     See Troxel, 
    530 U.S. at 68, 73
     (plurality)
    (declining to define the precise scope of the parental due
    process right, relying instead on the “sweeping breadth” of the
    statute and application of “broad, unlimited power,” and noting
    the absence of “special factors that might justify the State’s
    interference”); 
    id. at 89
     (Stevens, J., dissenting) (“The
    constitutional protection against arbitrary state interference
    with parental rights should not be extended to prevent the
    States from protecting children against the arbitrary exercise
    of parental authority that is not in fact motivated by an
    interest in the welfare of the child.”); 
    id. at 99
     (Kennedy, J.,
    dissenting) (“In the design and elaboration of their visitation
    laws, States may be entitled to consider that certain
    relationships are such that to avoid the risk of harm, a best
    interests standard can be employed by their domestic relations
    courts in some circumstances.”); cf. 
    id. at 92
     (Scalia, J.,
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    dissenting) (stating that he would not extend the theory of
    parental rights to extend to visitation decisions).
    Relying on the plurality in Michael H. v. Gerald D.,
    
    491 U.S. 110
     (1989), the Rhode Island Supreme Court noted that
    “under certain circumstances, even the existence of a developed
    biological parent-child relationship . . . will not prevent
    others from acquiring parental rights vis-à-vis the child.”
    Rubano, 
    759 A.2d at 974
    ; see also Troxel, 
    530 U.S. at 87-88
    (Stevens, J., dissenting) (discussing Michael H.).             Indeed, as
    Justice Kennedy stated in his dissenting opinion in Troxel,
    “Cases are sure to arise--perhaps a substantial number of cases-
    -in which a third party, by acting in a caregiving role over a
    significant period of time, has developed a relationship with a
    child which is not necessarily subject to absolute parental
    veto.”    
    530 U.S. at 98
     (Kennedy, J., dissenting) (citing Michael
    H., Quillon, and Lehr); see also 
    id. at 64
     (plurality)
    (“[P]ersons outside the nuclear family are called upon with
    increasing frequency to assist in the everyday tasks of child
    rearing.”).     Accordingly, “a fit parent’s right vis-à-vis a
    complete stranger is one thing; her right vis-à-vis another
    parent or a de facto parent may be another.”            
    Id. at 100-101
    (Kennedy, J., dissenting).
    In this case, the parties made a joint decision to
    adopt and raise Child.        Together, the parties named Child,
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    giving her each of their last names, and they lived together
    with B.B.’s teenage son as a family unit for a two-year period.
    From the time she could talk, Child referred to B.B. as “Papa”
    and A.A. as “Daddy,” and they jointly shared all parental care,
    duties, and responsibilities for Child from the time she was one
    month old.     Although A.A. and B.B. intended that A.A. would
    adopt Child and retained an attorney to accomplish the adoption,
    the adoption never occurred.         Additionally, following their
    separation, the parties continued to attend counseling together
    and entered into a 50/50 written co-parenting agreement.
    Accordingly, it appears from the family court’s findings that
    B.B. voluntarily incorporated A.A. into the family unit and
    encouraged him to share parental responsibilities and custody of
    Child.
    As the mother in Inoue facilitated the “circumstances
    under which [her husband] became [her oldest child’s] ‘legal
    father,’” B.B. voluntarily shared custody of Child with A.A.
    and, thus, made his own parental rights less exclusive vis-à-vis
    A.A.    See Inoue, 118 Hawaiʻi at 101, 
    185 P.3d at 849
    ; see also
    
    530 U.S. at 98
     (Kennedy, J., dissenting) (“[A] fit parent’s
    right vis-à-vis a complete stranger is one thing; her right vis-
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    à-vis another parent or a de facto parent may be another.”).17
    The circumstances of this case are entirely distinguishable from
    those governed by the grandparent visitation statute considered
    in Doe.                 See 116 Hawaiʻi at 325, 
    172 P.3d at 1069
    .       In this case,
    B.B. voluntarily allowed A.A. to share physical custody of Child
    in addition to sharing the duties and responsibilities for
    parenting child, and thus the circumstances do not implicate the
    17
    Cf. Smith v. Guest, 
    16 A.3d 920
    , 931 (Del. 2011) (holding that de
    facto parent statute did not violate the due process rights of child’s other
    legal parent because a de facto parent would also be a “legal ‘parent’” that
    would share a “co-equal ‘fundamental parental interest’” in raising the child
    with the other parent); C.E.W. v. D.E.W., 
    845 A.2d 1146
    , 1152 (Me. 2004)
    (holding that person’s status as the de facto parent of a child authorized
    the court to consider an award of parental rights and responsibilities to the
    person as a parent based on its determination of the best interest of the
    child); Rubano, 
    759 A.2d at 974
     (“[U]nder certain circumstances, even the
    existence of a developed biological parent-child relationship . . . will not
    prevent others from acquiring parental rights vis-à-vis the child.”); Brooke
    S.B. v. Elizabeth A. C.C., No. 91, 
    2016 WL 4507780
     (N.Y. Aug. 30, 2016)
    (expanding the definition of “parent” to include a partner of a domestic
    partnership that agrees to conceive a child and to raise the child together);
    In re Parentage of L.B., 
    122 P.3d 161
    , 177 (Wash. 2005) (“We thus hold that
    henceforth in Washington, a de facto parent stands in legal parity with an
    otherwise legal parent, whether biological, adoptive, or otherwise.”); In re
    Custody of B.M.H., 
    315 P.3d 470
    , 478 (Wash. 2013) (en banc) (“The de facto
    parentage doctrine incorporates constitutionally required deference to
    parents by requiring that the biological or legal parent consent to and
    foster the parentlike relationship. Once a petitioner has made the threshold
    showing that the natural or legal parent consented to and fostered the
    parent-like relationship, the State is no longer ‘interfering on behalf of a
    third party in an insular family unit but is enforcing the rights and
    obligations of parenthood that attach to de facto parents.’” (quoting In re
    Parentage of L.B., 
    122 P.3d 161
     (Wash. 2005) (en banc))); Randy A.J. v. Norma
    I.J., 
    655 N.W.2d 195
    , 201 (Wis. 2002) (noting that under Wisconsin’s
    equitable parent doctrine, “[o]nce a court determines that a party is an
    equitable parent, there is no distinction between the equitable parent and
    any other parent; each is endowed with the same rights and responsibilities
    of parenthood”), aff’d, 
    677 N.W.2d 630
    .
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    Hawaiʻi Constitution’s right to privacy as the grandparent
    statute in Doe did.18
    Additionally, we cannot conclude that B.B. has
    established the statute is facially unconstitutional.                                    See
    United States v. Salerno, 
    481 U.S. 739
    , 745 (1987) (“A facial
    challenge to a legislative Act is, of course, the most difficult
    challenge to mount successfully, since the challenger must
    establish that no set of circumstances exists under which the
    Act would be valid.”).                                     The de facto custody provision of HRS §
    571-46(a)(2) simply does not have the broad sweep that the
    grandparent visitation statute in Doe had.                                    Indeed, HRS § 571-
    46(a)(2) is one of several “standards, considerations, and
    procedures” that HRS § 571-46 provides for family courts tasked
    with handling custody and visitation disputes; it is but one
    tool in a court’s toolbox for navigating the varying and complex
    circumstances that may arise when custody to a child is in
    dispute.                   Additionally, HRS § 571-46 includes subsection (a)(1),
    which provides custody should be awarded to either parent or to
    both parents according to the best interests of the child, and
    18
    Our decision is based on the circumstances presented by this
    case. We note that a parent does not relinquish his or her parental rights
    by merely relying on childcare assistance from others. As stated, de facto
    custody is not established by mere physical custody of a child. Nonetheless,
    we decline to adopt a bright line rule regarding the extent of a parent’s
    protected liberty interest as “the constitutional protections in this area
    are best ‘elaborated with care’” on a case-by-case basis. See Troxel, 
    530 U.S. at 73
     (plurality) (quoting 
    id. at 101
     (Kennedy, J., dissenting)).
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    importantly, HRS § 571-46(a)(2) may also apply under
    circumstances where no parent or no fit parent seeks custody of
    the child.    HRS § 571-46 is therefore notably distinguishable
    from the grandparent visitation statute in Doe.            Indeed, the
    apparent purpose of the statute in Doe was to provide
    grandparents a means to circumvent the decisions of parents
    based on the legislature’s finding that “grandparents play a
    significant role in the lives of minor children and should be
    allowed reasonable visitation rights so long as it is in the
    best interests of the child.”        Doe, 116 Hawaiʻi at 332 n.6, 
    172 P.3d at
    1076 n.6 (quoting Sen. Stand. Comm. Rep. No. 1053, in
    1993 Senate Journal, at 1154).        The grandparent visitation
    statute was facially invalid as it undermined a parent’s
    judgment to not allow grandparents access to one’s child based
    merely on a finding that grandparent visitation was in the
    child’s best interests.       
    Id.
     (“Indeed, there can be no doubt
    that the legislature intended that visitation, if found by a
    court to be in the best interests of the child, may be ordered
    over a parent’s objection”); see Troxel, 
    530 U.S. 57
    , 67, 
    120 S. Ct. 2054
    , 2061, 
    147 L. Ed. 2d 49
     (2000) (“[I]n practical effect,
    in the State of Washington a court can disregard and overturn
    any decision by a fit custodial parent concerning visitation
    whenever a third party affected by the decision files a
    visitation petition, based solely on the judge’s determination
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    of the child’s best interests.”).                                         While there certainly may be
    situations where a family court’s application of HRS § 571-
    46(a)(2) may violate a parent’s constitutionally protected
    liberty interests, we do not conclude that the statute is
    facially invalid as the grandparent visitation statute in Doe
    was.
    In distinguishing Inoue, the family court placed great
    emphasis on the fact that the parties never married or entered
    into a civil union.                                        While it is true that the Inoue opinion
    discusses the fact that the parties were married in its
    analysis, it was important only because marriage was relevant to
    the paternity statute that was specifically challenged by the
    mother in Inoue.19                                   See Inoue, 118 Hawaiʻi at 94, 
    185 P.3d at 842
    .
    In that case, the biological mother’s husband and the child had
    a presumptive “parent child relationship” pursuant to HRS § 584-
    4(a)(3)(B) because of the subsequent marriage of the parties and
    19
    HRS § 584-4(a)(3)(B) (2006) provides,
    A man is presumed to be the natural father of a child if:
    . . .
    After the child’s birth, he and the child’s natural mother
    have married, or attempted to marry, each other by a marriage
    solemnized in apparent compliance with law, although the
    attempted marriage is or could be declared invalid, and:
    . . .
    With his consent, he is named as the child’s father on the
    child’s birth certificate . . . .
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    inclusion of husband on the birth certificate.                                  Id.   Thus,
    marriage was an essential element of the statute challenged by
    the mother in Inoue, and her voluntary creation of the
    circumstances giving rise to the presumptive parent-child
    relationship was important to the ICA, not the existence of a
    marriage itself.                                 See id. at 100, 
    185 P.3d at 848
    .     Indeed,
    Inoue found the reasoning of the Rubano case persuasive, see
    
    id.,
     although the parties were not married and the relationship
    of the parties was not discussed as an essential fact.                                    See
    Rubano, 
    759 A.2d at 976
    .                                   The heart of the Rubano decision
    concerned the relationship of the parties with the child--not
    the relationship between the parties.                                  See 
    id. at 974
    .    In any
    event, marriage is not an element of the de facto presumption of
    HRS § 571-46(a)(2), the provision on which A.A. bases his claim
    for joint custody of Child.20
    20
    Application of the family court’s marriage requirement would mean
    that a grandparent or other family member, such as a hānai parent, would
    never be able to establish a de facto custodial relationship with a child so
    long as the biological parent remains in the child’s life, even where the
    child views the third party as his or her only parental figure.
    By extension, we do not agree with B.B.’s contention that
    application of the de facto custody provision would create significant
    burdens that would apply to all domestic relationships where a single parent
    is involved as this is not a case where the parties simply lived together
    with a child. See State v. Sturch, 82 Hawaiʻi 269, 274, 
    921 P.2d 1170
    , 1175
    (App. 1996) (“A person to whom a statute may be constitutionally applied
    cannot challenge the statute on the ground that it may conceivably be applied
    unconstitutionally to others.” (quoting State v. Kaneakua, 
    61 Haw. 136
    , 143,
    
    597 P.2d 590
    , 594 (1979)). Indeed, we do not believe a person would be
    considered a “proper” person to have custody of the child under HRS § 571-
    46(a)(2) where the person’s sole connection to the child is a relationship
    with the parent. Additionally, we note that living in a household with a
    (continued . . .)
    34
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    Therefore, because B.B. permitted A.A. to share
    physical custody of Child in addition to the parenting
    responsibilities and duties with regard to Child, B.B. does not
    have a protected privacy interest in excluding A.A. from Child’s
    life under the Due Process Clause of the Fourteenth Amendment or
    the Hawaiʻi Constitution’s due process and privacy protections.
    As such, B.B. has not demonstrated that the application of HRS §
    571-46(a)(2) under the circumstances of this case would
    implicate his parental rights protected under the federal or
    Hawaiʻi constitutions.
    Given B.B. has not established that HRS § 571-46(a)(2)
    impacted a protected liberty interest nor a privacy interest
    under the Hawaiʻi Constitution, the statute’s prima facie de
    facto provision, which includes the best interests of the child
    standard, satisfies due process.                                                             See HRS § 571-46(a)(2).
    Indeed, HRS § 571-46(a)(2) provides B.B. with ample protections
    as he has not demonstrated the implication of a protected
    liberty interest.                                   HRS § 571-46(a)(1) favors the awarding of
    custody to the child’s parents, providing that custody “should
    be awarded to either or both parents,” and it also provides for
    child is not equivalent to having custody of a child although it may be
    relevant to the issue.
    Additionally, B.B.’s contention that the absence of a legal
    financial responsibility upon A.A. to support Child renders him ineligible to
    be awarded custody is unsupported by HRS § 571-46(a)(2).
    35
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    the maintenance of meaningful contact between the parent and
    child unless the parent “is unable to act in the best interest
    of the child.”                              HRS § 571-46(a)(2) states that custody “may” be
    awarded to a person who is not a parent “whenever the award
    serves the best interest of the child,” and it also creates a
    presumption in favor of awarding custody under limited
    circumstances to a person who has de facto custody.
    Accordingly, the de facto presumption, which is also subject to
    the best interests of the child standard, would only apply when
    the nonparent custodian is able to demonstrate that he or she
    (1) has had “de facto custody” of the child (2) in a stable and
    wholesome home and that (3) the custodian is a fit and proper
    person.                 Given that no protected liberty interest is
    demonstrated by B.B., the statute satisfies due process as
    applied in this case.21                                    B.B. has therefore not established that
    an award of custody to A.A. under HRS § 571-46(a)(2) would
    21
    The adequacy of the statute is evaluated in reference to whether
    a significant liberty interest is implicated. See Guidry, 105 Hawaiʻi at 227,
    
    96 P.3d at 247
    ; see also Lehr, 
    463 U.S. at 256
    . The Due Process Clause
    “provides heightened protection against government interference with certain
    fundamental rights and liberty interests.” Troxel, 
    530 U.S. at 65
    (plurality). As we conclude that B.B.’s fundamental parental rights are not
    implicated under the circumstances of this case, we need not apply a
    heightened scrutiny in evaluating whether HRS § 571-46(a)(2) satisfies due
    process. Cf. Doe, 116 Hawaiʻi at 335, 
    172 P.3d at 1079
     (applying strict
    scrutiny in determining that grandparent visitation statute was facially
    unconstitutional under the Hawaiʻi Constitution’s right to privacy).
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    impair his parental rights under the federal or Hawaiʻi
    constitutions.22
    III. CONCLUSION
    For the reasons discussed, the family court
    misapprehended the law when it required A.A. to establish that
    the application of HRS § 571-46(a)(2) would be constitutional if
    applied to his request for joint custody of Child.                                      The plain
    language of HRS § 571-46(a)(2) contemplates standing to seek
    custody when a person has had “de facto custody” of a child and
    meets the other requirements of HRS § 571-46(a)(2).                                      Further, we
    hold that B.B. failed to establish that the application of HRS §
    571-46(a)(2) to this case would infringe on his fundamental
    liberty interests or otherwise violate his right to privacy
    under the Hawaiʻi Constitution.23                                     Accordingly, we remand the case
    22
    Although it is not necessary to address in this case, it is noted
    that the State has a compelling state interest in maintaining the presence of
    a child in a stable and wholesome home with fit and proper persons. The
    State’s compelling interest and duty with regard to the welfare of children
    has long been recognized in this jurisdiction. See In re Guardianship of
    Thompson, 
    32 Haw. 479
    , 486 (1932). In addition, HRS § 571-46(a)(2) protects
    the interests and rights of children. See Troxel, 
    530 U.S. at
    89 n.9
    (collecting cases demonstrating that children have constitutionally protected
    rights).
    23
    We reject A.A.’s evidentiary challenges to the expert testimony
    presented at the hearing. Given her education and experience, Dr. De Costa
    was qualified to testify as an expert in the field of family behaviors and in
    the relationship of children with their families. See HRS § 571-46(a)(5)
    (providing that the court may decide that qualified “expert’s testimony is
    relevant to a just and reasonable determination of what is for the best
    physical, mental, moral, and spiritual well-being of the child whose custody
    is at issue”). The hypothetical opinion elicited from Dr. De Costa was
    admissible under Hawaiʻi Rule of Evidence (HRE) Rule 703. See HRE Rule 703
    cmt (1993). Dr. De Costa’s opinions regarding the potential harm to Child as
    (continued . . .)
    37
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    for proper application of HRS § 571-46(a)(2), including a
    determination as to whether A.A. satisfies the three elements of
    HRS § 571-46(a)(2) and, if so, for a custody award in Child’s
    best interests.
    Accordingly, the family court’s December 11, 2014
    “Findings of Fact, Conclusions of Law; Order/Final Judgment” is
    vacated, and the case is remanded to the family court for
    further proceedings consistent with this opinion.
    Michael S. Zola                                                                          /s/ Mark E. Recktenwald
    for petitioner
    /s/ Paula A. Nakayama
    Brian J. De Lima,                                                                        /s/ Sabrina S. McKenna
    Francis R. Alcain and
    Justin P. Haspe                                                                          /s/ Richard W. Pollack
    for respondent                                                                           /s/ Michael D. Wilson
    a result of the termination of the relationship between A.A. and B.B. and the
    doctor’s concerns about Child having a continued relationship with A.A. were
    relevant, within the doctor’s expertise, and would assist the court in
    determining Child’s best interests. See HRS § 571-46(a)(5). Dr. De Costa’s
    testimony regarding the mental health of B.B.’s son, including her diagnosis,
    was admissible as a proper foundation was laid, and it was relevant to the
    court’s consideration of the best interests of Child and whether A.A. was a
    fit and proper person for purposes of applying the de facto custody
    presumption of HRS § 571-46(a)(2). Dr. De Costa’s testimony regarding B.B.’s
    son’s test scores was admissible under HRE Rule 703 without their
    introduction into evidence. And, the family court’s finding of fact
    regarding Dr. De Costa’s testimony did not misstate her testimony and was
    supported by the record.
    With regard to Dr. Wyss’s testimony, it appears that the court
    considered the testimony of Dr. Wyss, but it found Dr. De Costa’s testimony
    more compelling, which is within the province of the trial court. See Exotics
    Hawaii-Kona, Inc. v. E.I. Du Pont De Nemours & Co., 116 Hawaiʻi. 277, 299, 
    172 P.3d 1021
    , 1043 (2007). Lastly, any error by the family court in restricting
    Dr. Wyss’s testimony to the contents of his report, or in not admitting his
    progress notes, was harmless because Dr. Wyss was permitted to testify that
    he was aware of the sex-abuse allegations against A.A. and that he did not
    believe that A.A. posed a threat of abuse to Child. However, if further
    evidentiary proceedings are held on remand, the family court may revisit its
    ruling regarding the proffered evidence.
    38