Geldermann v. Geldermann , 428 P.3d 477 ( 2018 )


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  •       Notice: This opinion is subject to correction before publication in the PACIFIC REPORTER.
    Readers are requested to bring errors to the attention of the Clerk of the Appellate Courts,
    303 K Street, Anchorage, Alaska 99501, phone (907) 264-0608, fax (907) 264-0878, email
    corrections@akcourts.us.
    THE SUPREME COURT OF THE STATE OF ALASKA
    DARCEY GELDERMANN,                             )
    )        Supreme Court Nos. S-16381/16401
    Appellant and            )
    Cross-Appellee,          )        Superior Court No. 3AN-10-12834 CI
    )
    v.                               )        OPINION
    )
    MATTHEW GELDERMANN,                            )        No. 7281 – August 31, 2018
    )
    Appellee and             )
    Cross-Appellant.         )
    )
    Appeal from the Superior Court of the State of Alaska, Third
    Judicial District, Anchorage, Patrick J. McKay, Judge.
    Appearances: Allison Mendel and John J. Sherman, Mendel
    Colbert & Associates, Inc., Anchorage, for Appellant and
    Cross-Appellee. Rhonda F. Butterfield, Wyatt & Butterfield,
    LLC, Anchorage, for Appellee and Cross-Appellant.
    Before: Stowers, Chief Justice, Winfree, Maassen, Bolger,
    and Carney, Justices.
    MAASSEN, Justice.
    I.    INTRODUCTION
    The parents of a young son divorced in 2011, agreeing that the mother
    would have primary physical custody during the school year. The father moved to
    California. When the child began experiencing behavioral problems, the parents agreed
    to switch custody for a few years, giving the father primary physical custody in
    California during the school year. The parties signed a custody modification agreement
    to this effect in December 2014, including both parents’ waivers of child support, but
    they did not file the agreement in court.
    The next year, following a dispute over the mother’s visitation, both parties
    sought a judicial resolution of custody. The father went to a California court seeking to
    make the 2014 change in custody permanent. The mother went to Alaska superior court
    seeking to enforce the original 2011 agreement that gave her primary physical custody.
    The Alaska court asserted jurisdiction; it ultimately modified physical custody in favor
    of the father but maintained the parents’ joint legal custody. The court also modified
    child support, ordering the mother to pay child support effective from the date the father
    first sought to modify custody in California.
    The mother appeals the physical custody and child support orders,
    challenging among other things the child support order’s effective date. The father
    cross-appeals, challenging the decision on joint legal custody. We affirm the court’s
    custody and child support orders, concluding that they are well supported by the
    evidence and that the court did not abuse its discretion in selecting the child support
    order’s effective date.
    II.   FACTS AND PROCEEDINGS
    A.     Facts
    Darcey and Matthew Geldermann married in 2005 and had a son in 2008.
    They divorced in February 2011. The superior court approved a custody agreement that
    established joint legal custody but gave primary physical custody to Darcey, with
    Matthew receiving visitation during summers and holidays. Matthew thereafter moved
    to Washington, spent time as a contractor in Iraq, and eventually settled in California.
    -2-                                     7281
    1.     Custody experiment
    The parties agree that their son exhibited behavioral problems when he
    started kindergarten in 2013; psychologists diagnosed him with autism, atypical attention
    deficit and hyperactivity disorder, unspecified anxiety disorder, and social
    communication disorder. To deal with these problems Darcey and Matthew agreed to
    try a temporary custody switch: their son would live primarily with Matthew in
    California for two and a half years and visit Darcey over summers and holidays. Around
    December 2014, when the child was six, the parties negotiated a new custody agreement
    that acknowledged the switch, but they did not formalize their new agreement in court.
    The informal new arrangement worked well for about 10 months. The child
    started school in California in January 2015. Matthew hired a nanny and established a
    rigorous routine, including many extracurricular activities. The child had fewer
    behavioral problems, and his grades improved. Matthew claims that his son “thrived”
    under the new arrangement.
    But the arrangement broke down in the fall of 2015 after a dispute over a
    planned visit by Darcey. The superior court found that the dispute generated “some
    angry emails,” including threats by Darcey that she would retrieve the child from
    California and make it difficult for Matthew to see him again. The parties filed custody-
    related motions in both California and Alaska courts; meanwhile the child remained with
    Matthew in California.
    While both cases were pending, the parties struggled to maintain civil
    communication with each other. The California court awarded Darcey a visit with her
    son in November 2015 when she was there for a hearing; the visit was not a success,
    though the parties disagree on why. In March 2016 Matthew moved the child to a new
    school following a bullying incident and failed to immediately inform Darcey of the
    change. In April the Alaska superior court, retaining jurisdiction, awarded Darcey
    -3-                                     7281
    spring-break visitation, requiring only that she provide an itinerary. The parties
    disagreed about how specific the itinerary needed to be, and Darcey ultimately canceled
    her visit. The superior court described the “failure” of the spring break visit as
    “disturbing” and “highly unfortunate.”
    2.     Child support
    As part of their 2011 divorce, the parties’ court-approved settlement
    agreement provided that Matthew would pay Darcey child support. But when their son
    moved in with Matthew in December 2014, “[t]he parties agree[d] that neither party
    [would] owe child support to the other party as a result.” In January 2015, accordingly,
    Darcey withdrew from the collection services provided by Alaska’s Child Support
    Services Division (CSSD). But when their current dispute arose, Darcey again requested
    CSSD assistance, and Matthew received a letter from CSSD in October 2015 directing
    that he pay Darcey the child support required by the 2011 agreement.
    B.     Proceedings
    1.     Custody
    In early October 2015 Matthew filed an ex parte custody action in
    California, seeking a transfer of jurisdiction from Alaska, a temporary emergency
    custody order, and a modification of custody to reflect the parties’ 2014 agreement
    giving him primary physical custody. Shortly thereafter Darcey commenced the current
    Alaska proceedings; she filed a motion to enforce the original 2011 custody arrangement
    that gave her primary physical custody. The Alaska superior court conferred with the
    California court, held an evidentiary hearing on jurisdiction in January 2016, concluded
    that neither forum was convenient for both parties, and ultimately decided to retain
    jurisdiction in Alaska.
    Matthew had not filed a motion in Alaska to modify custody. The superior
    court concluded, however, that his opposition to Darcey’s motion to enforce the 2011
    -4-                                      7281
    order amounted to, “at the very least, an implied custody modification request,” and it
    scheduled a trial on both physical and legal custody. The parties presented a number of
    witnesses, including themselves, their respective new spouses, their son’s California
    nanny, and Darcey’s mother.
    After hearing the evidence, the court denied Darcey’s motion to enforce the
    2011 order and awarded Matthew primary physical custody during the school year.
    Darcey was given summer vacations and alternating holidays as well as “generous and
    liberal, unrestricted, unsupervised visits with [the child], whenever she is in the same
    geographic location.” Although the court found significant communication problems
    between Darcey and Matthew, it continued joint legal custody.           Darcey sought
    reconsideration, claiming that custody modification was inappropriate absent a formal
    motion from Matthew. The court denied the motion, explaining that custody and
    visitation had been “always clearly at issue.”
    2.     Child support
    In October 2015 Darcey filed a motion to reduce to judgment past-due
    amounts of child support calculated under the 2011 order. In early December Matthew
    sought to stay enforcement of those child support provisions, and in January 2016 the
    court issued an order precluding collection of child support arrears from December 2014
    until it ordered otherwise.
    Matthew did not file any other documents related to child support until
    May 18, 2016, following the court’s custody decision, when he filed a proposed child
    support order. He proposed an effective date of “November 1, 2015, which is the first
    of the month after [Darcey] was formally served with notice of [Matthew’s] custody
    action in California.” Darcey objected, arguing that Alaska Civil Rule 90.3(h)(2)
    prohibited a retroactive date because Matthew had never filed a motion to modify child
    support.
    -5-                                     7281
    The court signed a new child support order on June 1, 2016, requiring
    Darcey to pay support to Matthew. The order used Matthew’s proposed effective date
    of November 1, 2015. Darcey sought reconsideration, which was denied.
    Both parties appealed. Darcey seeks review of the physical custody and
    child support orders, and Matthew challenges the award of joint legal custody.
    III.   STANDARDS OF REVIEW
    “Superior courts have broad discretion in child custody decisions, and we
    will reverse only if findings of fact are clearly erroneous or if the superior court abused
    its discretion.”1 “A factual finding is clearly erroneous when a review of the record
    leaves [us] with a definite and firm conviction that the superior court has made a
    mistake.”2 “An abuse of discretion exists where the superior court ‘considered improper
    factors in making its custody determination, failed to consider statutorily mandated
    factors, or assigned disproportionate weight to particular factors while ignoring
    others.’ ”3 “Additionally, an abuse of discretion exists if the superior court’s decision
    denied a substantial right to or substantially prejudiced a party.”4
    “We review an award of child support for abuse of discretion.”5 But
    “[w]hether the superior court applied the correct legal standard to its child support
    1
    Riggs v. Coonradt, 
    335 P.3d 1103
    , 1106 (Alaska 2014) (citing Ronny M.
    v. Nanette H., 
    303 P.3d 392
    , 399 (Alaska 2013)).
    2
    
    Id. (quoting Ronny
    M., 303 P.3d at 399
    ).
    3
    
    Id. (quoting Ronny
    M., 303 P.3d at 399
    ).
    4
    Ronny 
    M., 303 P.3d at 400
    (citing House v. House, 
    779 P.2d 1204
    , 1206
    (Alaska 1989)).
    5
    Limeres v. Limeres, 
    320 P.3d 291
    , 295 (Alaska 2014) (citing Swaney v.
    Granger, 
    297 P.3d 132
    , 136 (Alaska 2013)).
    -6-                                       7281
    determination is a question of law that we review de novo.”6 Finally, “[t]he adequacy
    of the notice and hearing afforded a litigant in child custody proceedings involves due
    process considerations,” which we also review de novo.7
    IV.	   DISCUSSION
    A.	    The Superior Court Did Not Abuse Its Discretion By Finding A
    Substantial Change In Circumstances For Purposes Of Modifying
    Physical Custody.
    “Alaska Statute 25.20.110 authorizes courts to modify child-custody and
    visitation awards if (1) there has been a change in circumstances that justifies
    modification and (2) the modification is in the best interests of the child.”8 “Once the
    movant meets [the initial] burden [of changed circumstances], he or she is entitled ‘to a
    hearing to consider whether, in light of such changed circumstances, it is in the child’s
    best interests to alter the existing custodial arrangement.’ ”9
    Darcey challenges only the court’s decision on the first element of the
    modification test: that there was a change in circumstances substantial enough to justify
    a modification of custody. We have held that “[a] change in circumstances is unlikely
    to be substantial enough to ‘overcome our deep reluctance to shuttle children back and
    forth between parents’ unless the change affects the children’s welfare and ‘reflect[s]
    6
    
    Id. (citing Koller
    v. Reft, 
    71 P.3d 800
    , 804 (Alaska 2003)).
    7
    Lashbrook v. Lashbrook, 
    957 P.2d 326
    , 328 (Alaska 1998).
    8
    Rego v. Rego, 
    259 P.3d 447
    , 452 (Alaska 2011) (citing Melendrez v.
    Melendrez, 
    143 P.3d 957
    , 962 (Alaska 2006)).
    9
    
    Lashbrook, 957 P.2d at 329
    (quoting A.H. v. W.P., 
    896 P.2d 240
    , 244
    (Alaska 1995)).
    -7-	                                   7281
    more than mere passage of time.’ ”10 Whether changed circumstances justify
    modification “is heavily fact-intensive” and “appropriately gauged by its effect on the
    child.”11 “The change in circumstances ‘must be demonstrated relative to the facts and
    circumstances that existed at the time of the prior custody order that the party seeks to
    modify.’ ”12
    The superior court in this case had to decide whether circumstances had
    substantially changed since the first custody agreement in 2011.13 In deciding that they
    had, the court relied on the change that prompted Darcey and Matthew to shift custody
    in 2014: “[T]here ha[s] been a change in circumstances . . . that was recognized by the
    parties when they agreed that [the child] would reside, at least temporarily, with his
    father.” It is undisputed that the child had behavioral problems in Alaska, and both
    parties agreed it would benefit him to live with Matthew in California for several years.
    Matthew had also had a change in employment that allowed for a more permanent
    residence, and both parents had remarried. The superior court did not abuse its discretion
    10
    Collier v. Harris, 
    377 P.3d 15
    , 22 (Alaska 2016) (second alteration in
    original) (quoting Hope P. v. Flynn G., 
    355 P.3d 559
    , 565 (Alaska 2015)).
    11
    
    Id. at 22,
    23 n.31.
    12
    Nelson v. Nelson, 
    263 P.3d 49
    , 52 (Alaska 2011) (quoting Peterson v.
    Swarthout, 
    214 P.3d 332
    , 341 (Alaska 2009)).
    13
    The 2014 agreement was not filed with the Alaska court until the current
    litigation, so our baseline for assessing change is the court-approved 2011 parenting
    agreement. See McClain v. McClain, 
    716 P.2d 381
    , 385 (Alaska 1986) (“Trial courts,
    not parents, are the ultimate decision makers as to custody and are not bound by private
    agreements.”).
    -8-                                      7281
    in concluding that these new circumstances, in combination, amounted to a substantial
    change.14
    Citing McLane v. Paul,15 Darcey argues that, as a matter of law, her
    temporary agreement with Matthew should not qualify as a substantial change in
    circumstances because “parties should be allowed to experiment with new custodial
    arrangements without the fear that they will automatically become permanent.” But the
    superior court did not point to the “new custodial arrangement” as the substantial change;
    rather, the court relied on the underlying circumstances that prompted the new custodial
    arrangement. The fact that the parties themselves recognize the substantiality of a
    change in circumstances and agree tentatively on how to deal with it cannot foreclose the
    court from recognizing the same thing.
    B.	    The Superior Court Did Not Violate Darcey’s Due Process Rights By
    Considering A Modification of Custody Without A Formal Motion
    From Either Party.
    Darcey argues that Matthew’s failure to file a motion to modify custody in
    Alaska prevented her from understanding “what the alleged change in circumstances
    was,” thus violating her due process rights to notice and a hearing. “Procedural due
    process under the Alaska Constitution requires ‘notice and opportunity for hearing
    14
    See Heather W. v. Rudy R., 
    274 P.3d 478
    , 482 (Alaska 2012) (“When
    reviewing whether a trial court was justified in finding a change in circumstances, we do
    not parse each alleged factual assertion of change, but instead look to see whether the
    circumstances in the aggregate establish a change of circumstances.”); Hunter v.
    Conwell, 
    219 P.3d 191
    , 197 (Alaska 2009) (“[T]he allegation that the boys have
    exhibited significant anger and behavioral issues after returning from Conwell’s
    home[, among other things], could warrant modification of custody.”).
    15
    
    189 P.3d 1039
    , 1044-45 (Alaska 2008) (holding that temporary agreement
    to allow child to stay with her father for one school year did not qualify as substantial
    change).
    -9-	                                     7281
    appropriate to the nature of the case.’ ”16 “To comply with due process, notice must be
    given sufficiently in advance of scheduled court proceedings so that the parties have a
    reasonable opportunity to prepare.”17 We have explained that “[i]t is essential to
    contested custody proceedings that the parties be afforded a hearing which grants them
    the opportunity to present the quantum of evidence needed to make an informed and
    principled determination.”18 But we have held that even without a formal motion from
    either party, “the trial court may decide [custody] issues on its own motion, as long as
    a party has raised them and both sides have the opportunity to present full testimony.”19
    Darcey argues that in the absence of a formal motion to modify custody, she
    “lacked notice as to the disputed issues and therefore had no ability to prepare to respond
    to Matthew’s case.” Darcey acknowledges that she received “late notice” at the trial call
    that modification was at issue, but she argues that because she was unrepresented, the
    absence of a formal motion “deprived her of any understanding of the issues to be
    addressed at trial, or the case Matthew intended to present against her retaining custody.”
    We have found due process violations in several cases when a parent lacked
    notice that permanent custody was at issue or the hearing was insufficient to determine
    16
    Lashbrook v. Lashbrook, 
    957 P.2d 326
    , 328 (Alaska 1998) (quoting Wright
    v. Black, 
    856 P.2d 477
    , 480 (Alaska 1993)).
    17
    Childs v. Childs, 
    310 P.3d 955
    , 960 (Alaska 2013) (citing Fidler v. Fidler,
    
    296 P.3d 11
    , 13 n.5 (Alaska 2013)).
    18
    
    Lashbrook, 957 P.2d at 328
    (quoting Cushing v. Painter, 
    666 P.2d 1044
    ,
    1046 (Alaska 1983)).
    19
    T.M.C. v. S.A.C., 
    858 P.2d 315
    , 318-19 (Alaska 1993). Because “the two
    prongs of the [custody modification] test are sufficiently interwoven,” the court has
    authority “to act on [its] own motion” regarding either a substantial change in
    circumstances or the subsequent best interests determination. 
    Id. at 319.
                                               -10-                                      7281
    the child’s best interests.20 In Siekawitch v. Siekawitch, on the other hand, we rejected
    a father’s due process claim because of his actual “notice that [the mother] sought equal
    time with the children.”21 Although the mother had not filed a motion to modify physical
    custody, she had sought equal time through a change in visitation “in her memorandum
    in support of her motion for a specific custody schedule, in her reply to [the father’s]
    opposition to the motion, and in her proposed visitation order.”22 Because the father’s
    pretrial motions and his conduct at trial indicated that he “was aware of [the mother’s]
    intentions” to seek equal time, we concluded that the father had sufficient notice of a
    possible modification to satisfy due process.23
    Darcey’s case is not meaningfully distinguishable from Siekawitch. First,
    Matthew’s filings and the court’s comments clearly indicated that custody modification
    20
    Debra P. v. Laurence S., 
    309 P.3d 1258
    , 1261 (Alaska 2013) (finding due
    process violation where superior court based its custody decision on “hearing [that]
    would decide issues of interim custody” and had told parties “that another final hearing
    [on permanent custody] would be scheduled if the parties were unable to reach a
    settlement”); Potter v. Potter, 
    55 P.3d 726
    , 728-29 (Alaska 2002) (holding due process
    was violated where father “was given no notice that modification of decreed visitation
    was at issue — indeed, based on the court’s rulings, both parties reasonably expected that
    decreed visitation would not be at issue”); 
    Lashbrook, 957 P.2d at 329
    -30 (remanding
    custody determination where trial court relied on previous domestic violence hearing in
    determining custody rather than holding hearing to address the “eight other factors
    specified in AS 25.24.150(c)”); 
    Cushing, 666 P.2d at 1046
    (finding due process violation
    where mother only received five days notice and “because of the time constraints
    imposed, the parties were limited to four witnesses apiece”).
    21
    
    956 P.2d 447
    , 450 (Alaska 1998).
    22
    
    Id. 23 Id.;
    see also Easley v. Easley, 
    394 P.3d 517
    , 521 (Alaska 2017) (“Because
    of the previous back-and-forth between the parties on the issue of enforcement of the
    divorce decree, [the former husband] lacked neither notice of [the former wife’s] desire
    to be paid her share of the estate nor an opportunity to oppose her arguments.”).
    -11-                                      7281
    was at issue.24 Although Matthew did not file a motion to modify custody in Alaska, he
    did file one in California, served on Darcey on October 8, 2015. And Matthew’s motion
    to transfer jurisdiction, filed two weeks later in Alaska, clearly conveyed his intent to
    modify custody in whichever state took jurisdiction. His January 14, 2016 reply on the
    jurisdiction issue also discussed which state should “hear the custody modification
    action.”
    The superior court’s interactions with Darcey clearly indicated its intent to
    consider modifying custody. When the court decided to retain jurisdiction in January
    2015, it stated that modification would be the subject of a future evidentiary hearing and
    asked the parties when they would be ready for it. At trial call, 15 days before the
    evidentiary hearing, the court clearly stated that physical and legal custody were at
    issue.25 And at the beginning of the hearing the court again stated that the “hearing [was]
    on custody modification.”
    Finally, the record supports a conclusion that Darcey understood from the
    outset that Matthew was seeking to modify custody.26 She acknowledged that she knew
    Matthew was attempting to modify custody in California when she sought the protection
    of Alaska’s courts: “Matthew . . . is trying to modify custody in California. He filed our
    Alaska custody order in the court of Orange County and is trying to modify it through
    24
    See 
    Siekawitch, 956 P.2d at 450
    .
    25
    Darcey pointed out that Matthew had not filed a motion to modify custody,
    and the superior court noted that “there’s an opposition to your motion to enforce which
    is at the very least an implied custody modification.” There is no written opposition to
    Darcey’s motion to enforce the 2011 custody order, as Matthew concedes. But his other
    filings clearly indicated his opposing position.
    26
    See 
    Siekawitch, 956 P.2d at 450
    (“[T]he record discloses that [the father]
    was aware of [the mother’s] intentions; in his opposition to [the mother’s] motion, he
    expressly acknowledged that [she] sought to share physical custody equally with him.”).
    -12-                                      7281
    the State of California and not Alaska.” When the court advised her at the trial call to
    “be prepared for the court to rule on who should have physical and legal custody,
    okay?,” Darcey responded “Okay.” Her trial brief, filed the day before trial, addressed
    “Custody Modification/Enforcement,” argued that “[t]here should be no modification of
    custody granted, and only enforcement of the existing order,” and addressed the statutory
    best interests factors. We conclude that the superior court did not err in concluding that
    Darcey had sufficient notice of a possible custody modification.27
    Darcey also had a sufficient opportunity to be heard; the hearing enabled
    the superior court to make a principled custody decision.28 Both parties presented
    evidence on the best interests factors. Darcey’s witnesses addressed her ability to care
    for the child and contrasted it with Matthew’s. She cross-examined Matthew about their
    relative abilities to foster their son’s relationship with the other parent, Matthew’s home
    environment, and his relationship with his family. She does not point to any additional
    evidence she would have presented if she had received earlier or more specific notice.
    27
    See id.; see also Childs v. Childs, 
    310 P.3d 955
    , 961 (Alaska 2013) (holding
    due process was not violated in a child support proceeding where father received notice
    in October, “had an opportunity to make his legal arguments and submit relevant
    financial documents,” and the superior court did not issue final custody order until the
    following February); Rebecca L. v. Martin C., No. S-14509, 
    2013 WL 1092714
    , at *3-4
    (Alaska Mar. 13, 2013) (concluding that eight days’ notice satisfied due process where
    “the parties had agreed years earlier” that they would revisit custody around that time,
    “they had been negotiating a custody modification for over a year by the time of the
    hearing,” mother had notice permanent custody was at issue, parents and court wanted
    resolution before school started in the fall, and mother “was able to present sufficient
    evidence allowing the superior court to make a determination and the record does not
    reflect minimal preparation”).
    28
    See Lashbrook v. Lashbrook, 
    957 P.2d 326
    , 328 (Alaska 1998) (quoting
    Cushing v. Painter, 
    666 P.2d 1044
    , 1046 (Alaska 1983)).
    -13-                                      7281
    Even taking Darcey’s self-represented status into account, we conclude that her due
    process rights were not violated.29
    C.	    It Was Not Error To Select November 1, 2015, As The Effective Date
    Of The Modified Child Support Award.
    We have observed that “a significant modification of the physical custody
    schedule is likely to require a new child support determination, regardless of whether a
    parent requests it.”30 But whether a parent requested the modification is relevant to
    whether the new order can have anything but prospective effect. Although Alaska Civil
    Rule 90.3(h)(2) prohibits most retroactive modifications of “[c]hild support arrearage,”
    the rule further provides that a modification may be made effective “on or after the date
    that a motion for modification . . . is served on the opposing party.”31 Darcey points out
    29
    Darcey relies heavily on VinZant v. Elam, in which we concluded that a
    show-cause hearing on a motion to enforce custody was insufficient under due process
    to allow a modification of custody. 
    977 P.2d 84
    , 86-87 (Alaska 1999). But unlike in
    VinZant, the parties here had notice and an opportunity to address the best interests
    factors. See 
    id. at 87.
          30
    Wells v. Barile, 
    358 P.3d 583
    , 589 (Alaska 2015) (observing that court’s
    entry of a tentative child support order reflecting ordered change in custody “was plainly
    the proper course” even though party moving for modification of custody had not
    requested change in support); see Swaney v. Granger, 
    297 P.3d 132
    , 137 n.15 (Alaska
    2013) (“We note that under Rule 90.3(a) the change of a child’s primary physical
    custodian from one parent to the other ordinarily will require modification of an existing
    support order.”); Potter v. Potter, 
    55 P.3d 726
    , 729 (Alaska 2002) (“Ordinarily, when
    parties informally agree to make a change in decreed custody or visitation that is not
    merely temporary or experimental, the change should be reflected both in a changed
    custody or visitation order and in a changed child support order.”).
    31
    The full text of Rule 90.3(h)(2) is as follows:
    No Retroactive Modification. Child support arrearage may
    not be modified retroactively, except as allowed by
    (continued...)
    -14-	                                     7281
    that Matthew never filed a motion to modify child support, and she argues that the
    superior court violated the retroactivity bar when it modified child support effective
    November 1, 2015, the first day of the month after Matthew filed his motion for
    modification of custody in California.
    In light of the purposes of Rule 90.3(h)(2) and the realities of custody
    litigation, we reject Darcey’s argument. We conclude that when, as here, a parent moves
    to modify custody based on an existing, de facto custody change, the prohibition on
    retroactivity does not bar the superior court from making a corresponding change in child
    support effective from the date the modification motion is served on the opposing party.
    A baseline principle is that child support calculations “must be based on the
    custody actually ordered, not exercised.”32 We explained in Turinsky v. Long that “[i]f
    the parties do not follow the custody order, they should ask the court to enforce the
    custody order or should move to modify the child support order.”33 Although modified
    child support may be calculated from the date a motion to modify child support is served
    on the opposing party, “[w]e have read Rule 90.3(h)(2) to prohibit increases or decreases
    in child support effective before” that date.34 Superior courts have discretion to choose
    a later date, but “the motion service date” is the earliest available date and “should be the
    31
    (...continued)
    AS 25.27.166(d) [where paternity is disestablished]. A
    modification which is effective on or after the date that a
    motion for modification, or a notice of petition for
    modification by the Child Support Services Division, is
    served on the opposing party is not considered a retroactive
    modification.
    32
    Turinsky v. Long, 
    910 P.2d 590
    , 598 (Alaska 1996).
    33
    
    Id. at 595.
           34
    Boone v. Boone, 
    960 P.2d 579
    , 585 (Alaska 1998).
    -15-                                       7281
    preferred effective date.”35 “[T]he superior court should exercise its discretion in
    selecting a different effective date only if it finds good cause for doing so.”36
    We recognize that our case law has not been entirely consistent on the issue
    of what “motion for modification” can be used to satisfy Rule 90.3(h)(2). We have not
    allowed the “functional equivalent” of a modification motion to determine the effective
    date of a support order.37 In Millette v. Millette we held that the earliest date the court
    could use for a modification of child support was the date the father received notice of
    the mother’s motion for modification of child support, which was months after the
    superior court had ordered a temporary change in custody; we noted that neither the
    court’s custody order nor the mother’s motion seeking modification of custody
    mentioned child support.38 We explained that a formal motion to modify child support
    was required “even where the circumstances have materially changed and a modification
    35
    
    Id. 36 Id.
           37
    See Millette v. Millette, 
    177 P.3d 258
    , 266 (Alaska 2008) (“We have held
    that ‘[w]ithout a valid motion before the court, a modification of child support would be
    retroactive and thus prohibited.’ This is true even where the circumstances have
    materially changed and a modification would likely be permitted upon motion.”
    (footnote omitted) (alteration in original) (quoting Wright v. Wright, 
    22 P.3d 875
    , 879
    (Alaska 2001))); 
    Wright, 22 P.3d at 879
    (“The only documents that satisfy the
    requirements of Rule 90.3 are motions or petitions for modification.”); State, Dep’t of
    Revenue, Child Support Enf’t Div., ex rel. Husa v. Schofield, 
    993 P.2d 405
    , 409 (Alaska
    1999) (“[W]e specifically rejected the idea that documents not mentioned in the text of
    the rule can be the ‘functional equivalent’ of a motion or petition to modify.”); Boone v.
    Gipson, 
    920 P.2d 746
    , 749-51 (Alaska 1996) (explaining that because Rule 90.3(h)(2)
    “contains no indication that ‘functional equivalents’ of motions for modification . . .
    suffice, we conclude that nothing short of a motion or petition for modification satisfies
    the requirement”).
    38
    
    Millette, 177 P.3d at 266
    .
    -16-                                      7281
    would likely be permitted upon motion.”39 “In such cases, the burden remains on the
    non-custodial parent to file a motion for modification of child support.”40 We have
    further observed that “allowing the court to alter [a parent’s] obligation absent the filing
    of a motion for modification would undermine Rule 90.3’s stated goal of ensuring
    predictability in determining the amount of child support to be paid.”41
    On the other hand, we recently indicated that a modification of child
    support could be effective as of the date of the mother’s motion to modify custody
    where, as in Millette, the motion was silent on child support.42 But because the father in
    that case “concede[d] that [the mother’s] motion to modify custody satisfied the
    [retroactivity] provision of Alaska R. Civ. P. 90.3(h)(2),” it was unnecessary for us to
    decide whether Rule 90.3(h)(2) was actually satisfied.43
    Harmonizing these cases requires us to again look at the purposes behind
    the retroactivity bar. Rule 90.3(h)(2) restates the federal prohibition of retroactivity
    found in the Bradley Amendment, which “specifies what laws a state must have in order
    to receive federal funds” for child support enforcement activities.44 Among the Bradley
    39
    
    Id. 40 Id.
           41
    
    Schofield, 993 P.2d at 408
    .
    42
    Swaney v. Granger, 
    297 P.3d 132
    , 136-37 (Alaska 2013).
    43
    
    Id. at 137
    n.15. Nevertheless we “note[d] that under Rule 90.3(a) the
    change of a child’s primary physical custodian from one parent to the other ordinarily
    will require modification of an existing support order.” 
    Id. 44 Karpuleon
    v. Karpuleon, 
    881 P.2d 318
    , 320 n.6 (Alaska 1994); see also
    Alaska R. Civ. P. 90.3 cmt. X.B (explaining that Rule 90.3(h)(3) “is intended to restate
    [the Bradley Amendment’s] prohibition”). The Bradley Amendment is shorthand for
    (continued...)
    -17-                                      7281
    Amendment’s requirements is that states have procedures ensuring that child support
    payments not be “subject to retroactive modification . . . except that such procedures may
    permit modification with respect to any period during which there is pending a petition
    for modification, but only from the date that notice of such petition has been given . . .
    to the obligee or (where the obligee is the petitioner) to the obligor.”45 Discussing the
    policy reasons behind the federal retroactivity bar in Karpuleon v. Karpuleon, we noted
    commentators’ concerns that evidence was sometimes not “easily attained or available”
    to support retrospective arguments about changed circumstances and that obligor parents
    should be required to act diligently when petitioning for reductions in their child support
    payments.46
    The United States Department of Health and Human Services (DHHS),
    responding to comments on the Bradley Amendment’s implementation, repeatedly
    emphasized that it is the obligation of the non-custodial parent — who “is in the best
    position to know of a change in circumstances” — “to take action promptly to seek
    modification of a support obligation.”47 Changed circumstances that trigger the obligor’s
    responsibility to act “might include” the fact that “the child [has gone] to live with the
    44
    (...continued)
    Section 9103(a) of the Omnibus Budget Reconciliation Act of 1986, 42 U.S.C.
    § 666(a)(9) (2012).
    45
    42 U.S.C. § 666(a)(9)(C).
    46
    
    Karpuleon, 881 P.2d at 321
    (quoting Prohibition of Retroactive
    Modification of Child Support Arrearages, 54 Fed. Reg. 15,757, 15,758 (Apr. 19, 1989)).
    47
    Prohibition of Retroactive Modification of Child Support Arrearages, 54
    Fed. Reg. at 15,761.
    -18-                                      7281
    obligor.”48 As relevant here, DHHS reiterated: “We do not . . . believe that . . . even a
    change of actual custody of the child should result in a modification of support liability
    unless the court or administrative authority is duly notified and sanctions such
    modification.”49    And the required notice is the formal notice required by state
    jurisdictional rules:
    We believe Congress intended that “date of notice” or “date
    notice is given” should be construed literally and in terms of
    acquiring personal jurisdiction over the other party. State law
    provides rules to determine when personal jurisdiction is
    acquired by service of notice of an action. Under these
    provisions, the “date of notice” or “date notice is given”
    should be interpreted by the State in the same way as it is
    generally applied to commence other civil litigation within
    the State. State law regarding the establishment of the date of
    notice that a petition has been filed dictates when the
    modification may be effective.[50]
    The federal agency comments do not interpret the Bradley Amendment as
    dictating the title, form, or substance of the “motion for modification” necessary to
    satisfy the retroactivity bar. They focus primarily on the importance of two factors:
    (1) notice that child support is at issue, and (2) that the notice be formal — that is, that
    it involve the court. In our view, a motion for modification of custody based on an
    existing, de facto change in physical custody will usually provide the other parent the
    same “fair warning that support may change” as the parent would receive from an
    48
    
    Id. 49 Id.
           50
    
    Id. at 15,763.
                                               -19-                                       7281
    explicit motion to modify child support.51 The requirements of federal law — focusing
    on notice and formal process — remain satisfied if the superior court has the flexibility
    to choose the date of that custody motion as the effective date for a modification of child
    support.52
    In this case, Matthew filed an ex parte custody action in California in early
    October 2015 that sought, among other things, a modification of custody to reflect the
    parties’ 2014 agreement giving him primary physical custody. Darcey acknowledges
    that Matthew informed her in late September that he was taking this action, and he later
    filed in Alaska a California “Proof of Personal Service” that showed she had been served
    51
    See Boone v. Boone, 
    960 P.2d 579
    , 585-86 (Alaska 1998) (“[S]ervice of the
    motion [to modify child support] gives the opposing party both fair warning that support
    may change and an opportunity to reassess, even before the court rules, the correct
    amount of support. This gives an opportunity to adjust consumption patterns in
    anticipation of modification, and thus minimize prejudice when relief is granted effective
    as of the service date.”).
    52
    We overrule Millette v. Millette, 
    177 P.3d 258
    , 266 (Alaska 2008), to the
    extent it would require an explicit request for a change in child support to be included
    in a motion for a change of custody before that motion could be used in setting the
    effective date for child support. Other cases that have applied the “no functional
    equivalents” principle are distinguishable as not involving either modifications of
    custody or the formal invocation of judicial process that we require here. In Wright v.
    Wright, 
    22 P.3d 875
    , 879 (Alaska 2001), the father filed motions to modify child support
    but they were rejected as defective; we held that “[w]ithout a valid motion before the
    court, a modification of child support would be retroactive and thus prohibited.” In
    State, Dep’t of Revenue, Child Support Enf’t Div., ex. rel Husa v. Schofield, 
    993 P.2d 405
    , 407-09 (Alaska 1999), the father sought a retroactive change in child support based
    on CSED’s implicit agreement that the existing order was erroneous, but “neither CSED
    nor [the parent had] filed or served a motion for modification.” In Boone v. Gipson, 
    920 P.2d 746
    , 749-51 (Alaska 1996), the mother sought a retroactive change in child support
    based on letters from CSED informing the father that it was reviewing his child support;
    we held that the earliest document that satisfied Rule 90.3(h)(2) was a formal motion to
    modify child support.
    -20-                                      7281
    with the pleadings on October 8, 2015. At that time the child was already living with
    Matthew, and Darcey acknowledges she had actual notice of Matthew’s intent to
    formalize their de facto custody arrangement by seeking to modify custody in California.
    We conclude that the superior court did not abuse its discretion when it
    selected November 1, 2015 — the first date of the month immediately following the
    filing of the California custody action — as the effective date of the new child support
    order.
    D.	    The Superior Court Did Not Abuse Its Discretion By Continuing Joint
    Legal Custody.
    Matthew argues in his cross-appeal that the superior court erred by refusing
    to modify joint legal custody despite its finding — and both parties’ testimony — that
    their communication had broken down. We conclude that this was not an abuse of
    discretion.53
    “Joint legal custody is preferred”54 but “is only appropriate when the
    parents can cooperate and communicate in the child’s best interest.”55 Thus, “the test for
    53
    Like modifications to physical custody, modifications to legal custody
    require a two-prong analysis. Rego v. Rego, 
    259 P.3d 447
    , 452 (Alaska 2011) (“Alaska
    Statute 25.20.110 authorizes courts to modify child-custody and visitation awards if
    (1) there has been a change in circumstances that justifies modification and (2) the
    modification is in the best interests of the child.”).
    54
    Jaymot v. Skillings-Donat, 
    216 P.3d 534
    , 540 (Alaska 2009) (citing Farrell
    v. Farrell, 
    819 P.2d 896
    , 899 (Alaska 1991)); Peterson v. Swarthout, 
    214 P.3d 332
    , 336
    n.6 (Alaska 2009) (citing Bell v. Bell, 
    794 P.2d 97
    , 99 (Alaska 1990)).
    55
    
    Jaymot, 216 P.3d at 540
    (quoting 
    Farrell, 819 P.2d at 899
    ).
    -21-	                                     7281
    evaluating the propriety of joint legal custody is whether or not the parties can cooperate
    and communicate regarding the children.”56
    Here, the superior court acknowledged “concerns about the parties’ ability
    to communicate” but also found that Darcey and Matthew had communicated “somewhat
    effectively” before the current issues arose in the fall of 2015. The court discussed its
    “hope that the parties will be able to communicate again, once the current issues are
    resolved.”57    We conclude that it was not manifestly unreasonable under the
    circumstances for the court to base its decision on that hope, grounded in turn in its direct
    experience with the parties.58
    V.     CONCLUSION
    We AFFIRM the superior court’s custody and child support orders.
    56
    
    Farrell, 819 P.2d at 900
    ; see also 
    Jaymot, 216 P.3d at 540
    (quoting 
    Farrell, 819 P.2d at 899
    ); Littleton v. Banks, 
    192 P.3d 154
    , 161 (Alaska 2008) (“[J]oint legal
    custody depends in large part on the ability of the parents to communicate.”).
    57
    See Collier v. Harris, 
    377 P.3d 15
    , 21 (Alaska 2016) (affirming a superior
    court’s decision not to modify legal custody where “the parties’ ability to communicate,
    though not ideal, was not unusual in the circumstances and was adequate to support
    continued joint decision-making”).
    58
    Matthew also argues on his cross appeal that the superior court clearly erred
    by finding that Darcey was “currently divorcing” her husband. The superior court made
    a supplemental finding on this issue later, and we need not address it.
    -22-                                       7281