Allan T. Thoms Vs. Iowa Public Employees' Retirement System And Employment Appeal Board ( 2006 )


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  •                 IN THE SUPREME COURT OF IOWA
    No. 58 / 04-1730
    Filed June 2, 2006
    ALLAN T. THOMS,
    Appellant,
    vs.
    IOWA PUBLIC EMPLOYEES’
    RETIREMENT SYSTEM and
    EMPLOYMENT APPEAL BOARD,
    Appellees.
    ________________________________________________________________________
    Appeal from the Iowa District Court for Polk County, Robert J.
    Blink, Judge.
    Appeal from district court judgment affirming administrative
    agency’s determination of retiree’s pension benefits. AFFIRMED.
    Alice E. Helle and Douglas E. Gross of Brown, Winick, Graves,
    Gross, Baskerville and Schoenebaum, P.L.C., Des Moines, for appellant.
    Gregg A. Schochenmaier, Des Moines, for appellees.
    2
    CADY, Justice.
    In this judicial review proceeding, an Iowa Public Employees’
    Retirement System (IPERS) pensioner who retired, returned to work, and
    retired again claims he was entitled to have his retirement benefits
    calculated by adding the years of his original employment to the years of
    his reemployment. Instead, IPERS calculated the amount of his benefits
    by   separately       determining     his   benefits    based     upon     his   original
    employment and adding them to the benefits calculated from the period
    of his reemployment. The district court affirmed the Employment Appeal
    Board decision that affirmed a decision by an administrative law judge
    (ALJ) that found IPERS properly determined the benefits. On our review,
    we affirm the district court.
    I.       Background Facts and Proceedings
    Allan Thoms was a State employee covered by IPERS. In 1994, at
    age fifty-six, he retired from his State employment after 14.75 years of
    service. He began receiving monthly IPERS benefits of $570.78 in July
    1994.        In April 1995, he returned to IPERS-covered employment.                  His
    retirement benefits were suspended after his earnings exceeded the
    limitation in Iowa Code section 97B.48A (1995). 1 Thoms worked for the
    1That   section provided:
    If, after the first day of the month in which the member attains
    the age of fifty-five years and until the member’s sixty-fifth birthday, a
    member who has a bona fide retirement under this chapter is in regular
    full-time employment during a calendar year, the member’s retirement
    allowance shall be suspended for as long as the member remains in
    employment for the remainder of that calendar year. However, effective
    January 1, 1992, employment is not full-time employment until the
    member receives remuneration in an amount in excess of seven
    thousand four hundred forty dollars for a calendar year. Effective the
    first of the month in which a member attains the age of sixty-five years, a
    retired member may receive a retirement allowance after return to
    covered employment regardless of the amount of remuneration received.
    3
    State for an additional 6.5 years, and retired again on October 26, 2001.
    He then applied for retirement benefits.
    On January 30, 2002, IPERS notified Thoms by letter that his final
    wages had been credited to his account, and his reemployment
    termination notice had been processed. IPERS gave Thoms the choice of
    a lump-sum refund or monthly benefits for the remainder of his life.
    Thoms      requested      monthly      benefits,     which     were     subsequently
    recalculated to be $1441.83. This amount was based upon his original
    monthly benefit of $570.78, added to the monthly benefit of $871.05
    derived from his period of reemployment.
    Thoms appealed the recalculation of benefits, asserting his “benefit
    should be recalculated to take into account his additional years of
    service, additional earnings and increased age at the time of his ‘re-
    retirement,’ with a single recalculated retirement allowance being paid.”
    See Iowa Code § 97B.20A (2001) (“If the party appeals the decision of the
    department, the department shall conduct an internal review of the
    decision and the chief benefits officer shall notify the individual who has
    filed the appeal in writing of the department’s decision.”).                  In other
    words, Thoms wanted his retirement benefits recalculated based on the
    total years of service from his two periods of employment and the
    circumstances existing at the time of his second retirement.                   The two
    different methods of calculations resulted in a significant difference in
    the amount of benefits. 2 IPERS conducted an internal review and issued
    ________________________
    Iowa Code § 97B.48A(1) (1995).
    2Thoms wanted IPERS to add his first period of employment, 14.75 years, to his
    second period of employment, 6.75 years, for a total of 21.5 years. This increases his
    total benefit more than just adding the two calculated benefits together because IPERS
    benefits are calculated using a “fraction of years of service,” in which the numerator is
    the years of service, and the denominator is 30. The formula for calculating monthly
    IPERS benefits is:
    4
    a final agency determination affirming its recalculation of Thoms’s
    benefits. See id.
    Thoms appealed IPERS’s determination to the Department of
    Inspections and Appeals (DIA). See id. (“The individual who has filed the
    appeal may file an appeal of the department’s final decision with the
    department under chapter 17A by notifying the department of the appeal
    in writing within thirty days after the notification of its final decision was
    mailed to the party’s last known mailing address.                  Once notified, the
    department shall forward the appeal to the department of inspections
    and appeals.”). An administrative law judge (ALJ) with the DIA held a
    hearing. Thoms and IPERS entered into a stipulation of facts (agreeing
    to the facts set forth above) and submitted it to the ALJ. The ALJ issued
    its decision on January 20, 2004. The ALJ found IPERS was correct in
    calculating separate benefits based on the separate employment periods
    ________________________
    Years of service
    1/12 × (.60 × three-year average covered wage) ×           30
    Iowa Code § 97B.49A(3) (2001); Iowa Code § 97B.49(5)(b) (1995).
    Thoms also wanted to use a figure of approximately $100,000 for his three-year
    average covered wage, not the $35,666 average wage used by IPERS. The $35,666
    figure is the average of Thoms’s wages in 1992, 1993, and 1994—the three years before
    his initial retirement.     Before Thoms retired the second time, his salary was
    approximately $100,000.
    Finally, Thoms wanted to calculate his benefits based on his age at the time of
    the second retirement, 64. When he retired the first time, he was 56, so IPERS applied
    an early-retirement penalty. See Iowa Code § 97B.50(1)(a) (1995) (“[A] vested member,
    upon retirement prior to the normal retirement date . . . is entitled to receive a monthly
    retirement allowance . . . reduced as follows: . . . For a member who is less than sixty-
    two years of age, by twenty-five hundredths of one percent per month for each month
    that the early retirement date precedes the normal retirement date.”). He wanted IPERS
    to do a new calculation of his benefits as of 2001, when he was 64, so no early-
    retirement penalty would apply. See Iowa Code § 97B.50(3) (2001) (“A member who is
    at least sixty-two years of age and less than sixty-five years of age, and who has
    completed twenty or more years of membership service and prior service, shall receive
    benefits under 97B.49A through 97B.49G, as applicable, determined as if the member
    had attained sixty-five years of age.”).
    5
    and adding them together to send a single check. Thoms petitioned for
    review by the Employment Appeal Board. See id. § 97B.27. The Board
    affirmed and adopted the ALJ’s decision.
    Thoms filed a petition for judicial review in district court. See id.
    § 97B.29 (“Judicial review of action of the system may be sought in
    accordance with the terms of the Iowa administrative procedure act.”).
    Thoms claimed the agency decision was subject to reversal under each of
    the fourteen grounds for reversal in the administrative procedure act.
    See id. § 17A.19(10)(a)-(n).    The district court affirmed the agency’s
    decision. Thoms appeals.
    II.   Standard of Review
    The Iowa Administrative Procedure Act, Iowa Code chapter 17A,
    governs the scope of our review in this case. Iowa Code § 97B.29. Under
    the Act, we may only interfere with the agency decision if it is erroneous
    under a ground enumerated in the statute, and a party’s substantial
    rights have been prejudiced. Id. § 17A.19(10).     Thoms did not specify
    which of the grounds in the statute supports reversal of the agency’s
    decision. However, Thoms is challenging the agency’s interpretation of
    Iowa Code section 97B.48A, the statute governing benefits upon
    retirement after employment.      Section 17A.19(10)(c) provides that an
    agency’s action is subject to reversal if it is “[b]ased upon on erroneous
    interpretation of a provision of law whose interpretation has not clearly
    been vested in the discretion of the agency.” Id. § 17A.19(10)(c); see also
    Arthur E. Bonfield, Amendments to Iowa Administrative Procedure Act
    (1998) Chapter 17A, Code of Iowa (House File 667 As Adopted) 62 (1998)
    [hereinafter Bonfield] (“Normally, the interpretation of a statute is a pure
    question of law over which agencies are not delegated any special powers
    6
    by the General Assembly so, a court is free to, and usually does,
    substitute its judgment de novo 3 for that of the agency and determine if
    the agency interpretation of the statute is correct. That is what the first
    ten words of paragraph (c) say.”).              This section utilizes the familiar
    correction-of-errors-at-law standard of review.                Section 17A.19(10)(l)
    provides that an agency’s action is subject to reversal if it is “[b]ased
    upon an irrational, illogical, or wholly unjustifiable interpretation of a
    provision of law whose interpretation has clearly been vested by a
    provision of law in the discretion of the agency.”                         Iowa Code
    § 17A.19(10)(l); see also Bonfield at 62 (“[W]here the General Assembly
    clearly delegates discretionary authority to an agency to interpret or
    elaborate a statutory term based on the agency’s own special expertness,
    the court may not simply substitute its view as to the meaning or
    elaboration of the term for that of the agency but, instead, may reverse
    the agency interpretation or elaboration only of it is arbitrary, capricious,
    unreasonable, or an abuse of discretion.”).                 This section utilizes a
    deferential abuse-of-discretion standard of review.              Bonfield at 62.       To
    determine which section governs our review—and, consequently, how
    much deference we give to the agency’s interpretation—we must
    determine whether the interpretation of section 97B.48A has “clearly
    been vested in the discretion of” IPERS.
    3De novo, of course, means “anew.” Black’s Law Dictionary 447 (7th ed. 1999).
    When we interpret a statute “de novo,” what we are doing is employing our familiar
    correction-of-errors-at-law standard of review. See, e.g., Norwest Credit, Inc. v. City of
    Davenport, 
    626 N.W.2d 153
    , 155 (Iowa 2001) (stating that under correction-of-errors-of-
    law standard, we are not bound by lower tribunals’ determinations of law but instead
    interpret the law on our own and determine whether our conclusion mirrors that
    already made); see also Bonfield at 62 (“[M]ost Iowa cases treat agency interpretation of
    the meaning of a statute as a pure question of law over which they have de novo review,
    allowing the court simply to substitute its opinion of the meaning of the statute for that
    of the agency . . . .”).
    7
    Chapter 97B makes IPERS the administrator of the retirement
    system established under Iowa Code chapter 97B.         See 
    id.
     § 97B.4(2)
    (setting forth IPERS’s powers and duties); see also id. § 97B.1(1) (“The
    Iowa public employees’ retirement system shall administer the system
    established under this chapter.”).    Section 97B.4 provides IPERS with
    rulemaking authority:
    The system may adopt . . . rules . . . and take other
    action it deems necessary for the administration of the
    retirement system in conformity with the requirements of
    this chapter, the applicable provisions of the Internal
    Revenue Code, and all other applicable federal and state
    laws. The rules shall be effective upon compliance with
    chapter 17A.
    Id. § 97B.4(2)(a).    We have held that similar language vested the
    interpretation of a statute in the relevant agency’s discretion. In City of
    Marion v. Iowa Dep’t of Revenue & Finance, we concluded that Iowa Code
    section 422.68(1), which provides, “The director shall have the power and
    authority to prescribe all rules not inconsistent with the provisions of
    this chapter, necessary and advisable for its detailed administration and
    to effectuate its purposes,” vested the interpretation of section 422.45(20)
    with the department of revenue and finance. City of Marion, 
    643 N.W.2d 205
    , 207 (Iowa 2002); accord Auen v. Alcoholic Beverages Div., 
    679 N.W.2d 586
    , 590 (Iowa 2004) (concluding section 123.21, granting the
    agency authority to adopt rules “necessary to carry out this chapter”
    “clearly vested the interpretation of section 123.45 with the agency”);
    Becker v. Iowa Dep’t of Human Servs., 
    661 N.W.2d 125
    , 128-29 (Iowa
    2003) (“We give weight to administrative interpretations of statutes that
    agencies administer.” (citing 
    Iowa Code § 4.6
    (6); City of Waterloo v. Black
    Hawk Mut. Ins. Ass’n, 
    608 N.W.2d 442
    , 445 (Iowa 2000); In re G.J.A., 
    547 N.W.2d 3
    , 6 (Iowa 1996))).    Thus, we utilize a deferential standard of
    8
    review in this case. This does not mean the agency’s interpretation is
    conclusive, but we give it “appropriate deference.”                See Iowa Code
    § 17A.19(11)(c) (stating that with respect to matters vested by law in an
    agency,      we   “[s]hall   give   appropriate    deference”     to    the   agency’s
    interpretation); see also Bonfield at 72 (defining “appropriate deference”
    to mean “the agency action is subject to review by the unreasonable,
    arbitrary, capricious, or abuse of discretion standard”).                We will not
    reverse an agency action based on an interpretation of law whose
    interpretation has been clearly vested by a provision of law in the
    agency’s discretion, unless the agency’s interpretation is “irrational,
    illogical, or wholly unjustified.” Iowa Code § 17A.19(10)(l); see also Niles
    v. Iowa Dist. Court, 
    683 N.W.2d 539
    , 541 (Iowa 2004) (explaining that in
    interpreting statutes, specific terms (such as “irrational, illogical, or
    wholly    unjustified”)      control   general    terms   (such    as    “appropriate
    deference” (citing Burton v. Univ. of Iowa Hosps. & Clinics, 
    566 N.W.2d 182
    , 189 (Iowa 1997); Christenson v. Iowa Dist. Ct., 
    557 N.W.2d 259
    ,
    262-63 (Iowa 1996))).
    III.     Discussion
    Section 97B.48A(3) determines how benefits are to be calculated
    when an IPERS member retires from covered employment, then resumes
    covered employment, and retires again.                Both parties agreed the
    resolution of the correct computation of benefits rests with this statute.
    It provides:
    Upon a retirement after reemployment, a retired
    member may have the retired member’s retirement allowance
    redetermined under this section or section 97B.48, section
    97B.50, or section 97B.51, whichever is applicable, based
    upon the addition of credit for the years of membership
    service of the employee after reemployment, the covered
    wage during reemployment, and the age of the employee
    after reemployment. The member shall receive a single
    9
    retirement allowance calculated from both periods of
    membership service, one based on the initial retirement and
    one based on the second retirement following reemployment.
    If the total years of membership service and prior service of a
    member who has been reemployed equals or exceeds thirty,
    the years of membership service on which the original
    retirement allowance was based may be reduced by a
    fraction of the years of service equal to the number of years
    by which the total years of membership service and prior
    service exceeds thirty divided by thirty, if this reduction in
    years of service will increase the total retirement allowance of
    the member. The additional retirement allowance calculated
    for the period of reemployment shall be added to the
    retirement allowance calculated for the initial period of
    membership service and prior service, adjusted as provided
    in this subsection. The retirement allowance calculated for
    the initial period of membership service and prior service
    shall not be adjusted for any other factor than years of
    service. The retired member shall not receive a retirement
    allowance based upon more than a total of thirty years of
    service. Effective July 1, 1998, a redetermination of a
    retirement allowance as authorized by this subsection for a
    retired member whose combined service exceeds the
    applicable years of service for that member as provided in
    sections 97B.49A through 97B.49G shall have the
    determination of the member’s reemployment benefit based
    upon the percentage multiplier as determined for that
    member as provided in sections 97B.49A through 97B.49G.
    Iowa Code § 97B.48A(3).
    Based on this statute, IPERS calculates retirement benefits for
    members who retire after reemployment by taking the sum of the
    benefits calculated from the initial period of employment and the benefits
    calculated from the period of reemployment.           These two separate
    calculations are then added together into a single retirement allowance.
    One administrative rule promulgated by IPERS similarly explains the
    recomputation of benefits by a member who is reemployed in covered
    employment after retirement and retires again. It provides:
    A member who is reemployed in covered employment
    after retirement may, after again retiring from employment,
    request a recomputation of benefits.          The member’s
    retirement benefit shall be increased if possible by the
    addition of a second annuity, which is based on years of
    10
    reemployment service, reemployment covered wages and the
    benefit formula in place at the time of the recomputation. A
    maximum of 30 years of service is creditable to an individual
    retired member. If a member’s combined years of service
    exceed 30, a member’s initial annuity may be reduced by a
    fraction of the years in excess of 30 divided by 30. The
    second retirement benefit will be treated as a separate
    annuity by IPERS. Any contributions that cannot be used in
    the recomputation of benefits shall be refunded to the
    employee and the employer.
    
    Iowa Admin. Code r. 495
    —12.8(3) (2004) (emphasis added).
    Thoms primarily challenges the method of calculation by IPERS by
    isolating the second sentence in the relevant statute, “The member shall
    receive a single retirement allowance calculated from both periods of
    membership, one based on the initial retirement and one based on the
    second retirement following reemployment.” Iowa Code § 97B.48(3). He
    claims this sentence expresses the legislative intent for retired members
    to receive “a single retirement allowance,” not two allowances added
    together, calculated from both periods of membership service, meaning
    the total years of service. In other words, Thoms claims this sentence
    means benefits following retirement after reemployment are determined
    by adding the two periods of employment together and computing
    benefits based on a single uninterrupted period of employment. IPERS,
    on the other hand, asserts this sentence merely means that the member
    should only receive one monthly allowance in the form of a single check
    for the total of the two benefits added together.
    We interpret statutes by considering them as a whole, not by
    looking at isolated parts of the statute. State v. Young, 
    686 N.W.2d 182
    ,
    184-85 (Iowa 2004). Thus, we begin our analysis with the entire statute
    in mind.
    A member who retires after reemployment already has an existing
    retirement allowance in place.     The benefits are merely suspended or
    11
    otherwise limited during the period of reemployment. Thus, retirement
    after a period of reemployment means the existing retirement allowance
    may need to be redetermined based upon the period of reemployment.
    Section 97B.48A(3), the statute at the center of this controversy,
    addresses how the allowance is redetermined.
    We acknowledge the section is not crystal clear, especially
    considering only the first two sentences of the statute.     The statute
    addresses a complicated subject matter that involves a very detailed and
    intricate process. It is not always easy to express mathematical formulas
    in words, and it is understandable how different interpretations can
    result from statutes describing the rather enigmatic subject of retirement
    and pension plans.     We have recognized the ease with which different
    interpretations can result from almost all statutes, and this is even more
    so with pension statutes. See Teamsters Local Union No. 421 v. City of
    Dubuque, 
    706 N.W.2d 709
    , 713 (Iowa 2005) (“Disputes over the
    interpretation of a statute can arise even with the most carefully drafted
    laws. Disputes arise because it is nearly impossible, even for the most
    thoughtful lawmakers, to anticipate all future circumstances and neatly
    corral them into communicative words.” (citing 2A Norman J. Singer,
    Statutes and Statutory Construction § 45:02, at 15 (6th ed. 2000))).
    However, when section 97B.48A(3) is considered in its entirety, it
    becomes clear that the redetermination is based upon the sum of the two
    separate benefit amounts computed for each period of employment.
    Thus, we find it largely unnecessary to lock horns over particular words
    and phrases within each sentence of the statute in this case because the
    entirety of the statute clearly resolves the dispute.
    12
    After the statute describes in the first sentence the three factors
    upon which a redetermination is made (“the years of membership after
    reemployment, the covered wage during reemployment, and the age of
    the employee after reemployment”), and explains in the second sentence
    that the member receives a single retirement allowance based on the
    redetermination calculated from both periods of service (“The member
    shall receive a single retirement allowance calculated from both periods
    of membership service, one based on the initial retirement and one based
    on the second retirement following reemployment.”), the third sentence
    describes the calculation method when the total years of service exceeds
    thirty years. While the third sentence is not factually applicable to this
    case, it unmistakably clarifies the intended calculation scheme under the
    statute for retirement after reemployment.
    It was necessary for the legislature to articulate a specific provision
    describing how a retirement allowance would be calculated for retirement
    after reemployment in the event the total years of membership service
    exceeded thirty years because monthly IPERS benefits equal one-twelfth
    of the applicable percentage of the three-year average covered wage
    multiplied by the fraction of years of service, which is the years of service
    divided by thirty years. Iowa Code § 97B.49A(3). However, this fraction
    of years of service, used as the multiplier, can never exceed one.                   Id.
    § 97B.49A(1)(b). Thus, years of service by a state employee in excess of
    thirty years do not benefit a member in the calculation process by
    increasing the fraction of years of service to a number greater than one. 4
    4Years of service by a state employee over thirty years do add to the applicable
    percentage of the applicable wage component in the formula by increasing it up to a
    maximum of sixty-five percent. Id. § 97B.49A(1)(a). That is, IPERS benefits are
    calculated in part based on sixty percent of the three-year average covered wages. Id.
    § 97B.49A(3). Years of service in excess of thirty can increase this percentage up to
    sixty-five percent. Id. § 97B.49A(1)(a).
    13
    Consequently, when a member retires after reemployment with more
    than thirty years of total service, the third sentence of the statute
    permits the member to adjust the initial retirement allowance by
    reducing the service years used in the calculation by the total number of
    service years in excess of thirty, so the calculation of the second
    retirement allowance based on the period of reemployment can utilize
    those years in the event they will make the total allowance greater.
    Without this provision, the second retirement allowance could only use
    the number of years remaining after the original years of service during
    the original period of employment up to thirty. 5
    This procedure is important in interpreting the statute because it
    clearly reveals that the single retirement allowance given after retirement
    following reemployment is based on two separate calculations, which are
    then added together. That is, the calculation process described in the
    5The   operation of this procedure can be best described by using an example.
    Assume an employee initially worked for 20 years, then retired, then later became
    reemployed for 12 more years. Because the final retirement allowance can only be
    based on 30 years of service, 2 years of the employee’s reemployment would essentially
    go to waste and could not be used in the “fraction of years of service” used as the
    multiplier in determining the retirement allowance. This is true because the fraction
    used to calculate the benefit amount for the period of reemployment could only be
    10/30, instead of 12/30, since the fraction used to calculate the initial retirement
    benefit was 20/30.       However, the legislature recognized that it may be more
    advantageous for the employee to have the final allowance calculated based on more of
    the reemployment years, as opposed to original employment years. Thus, instead of
    using 20/30 for the “fraction of years of service” used to calculate the benefit amount
    for the original employment, the statute allows the employee to reduce that fraction by a
    fraction in which the “extra” years of service are the numerator, and 30 is the
    denominator. This would then permit the retired member to use the full 12 years of
    service in the fraction used to calculate the benefit amount for the period of
    reemployment. So, in our example, the new fractions would be:
    Fraction of Years of Service                Fraction of Years of Service
    for Original Employment                     for Reemployment
    Was          Now                            Was         Now
    20 − 2 = 18                                  10          12
    30     30     30                             30          30
    14
    first two sentences reveals that the calculation of the second retirement
    benefit amount is based on the period of reemployment, which is then
    added to the initial retirement benefit amount for a total single
    allowance.    Clearly, if the statute instead contemplated that the
    calculation was made after adding together the two periods of
    employment, as claimed by Thoms, it would be unnecessary for our
    legislature to implement the procedure described in the third sentence
    governing reemployment that covers total service years in excess of thirty
    years. In other words, it would be unnecessary to have a procedure to
    permit a retired member to allocate the thirty-years-of-service cap
    between the first period of service and the second period of service to
    come up with the most advantageous final retirement allowance if the
    two periods of employment were combined together anyway and the
    benefit was determined based on factors existing at the time of the
    second retirement. It would be unnecessary because the allowance for
    retirement after reemployment under that method of calculation would
    not change depending on the number of years of service allocated
    between the two periods. We will not read a statute so that any provision
    will be rendered superfluous. See Miller v. Marshall County, 
    641 N.W.2d 742
    , 749 (Iowa 2002) (“Each term [in a statute] is to be given effect, so
    that no single part is rendered insignificant or superfluous.” (Citation
    omitted.)); 2A Singer § 46:06, at 181 (“ ‘It is an elementary rule of
    construction that effect must be given, if possible, to every word, clause
    and sentence of a statute.’ ”).
    The remainder of the statute only confirms this interpretation. In
    particular, the fourth sentence makes it clear that the additional (second)
    retirement allowance calculated for the reemployment period is “added”
    15
    to the initial retirement allowance, as adjusted, calculated for the initial
    period.      See Iowa Code § 97B.48A(3) (“The additional retirement
    allowance calculated for the period of reemployment shall be added to
    the retirement allowance calculated for the initial period of membership
    service . . . , adjusted as provided in this subsection.”). Any doubt cast
    by the first two sentences over the question whether the final allowance
    is calculated based on separate periods of service or a combination of the
    periods of service is amply resolved by considering the entire statute.
    We conclude the interpretation of the statute by IPERS under its
    applicable rules and regulations reflects the intent of the legislature to
    calculate retirement benefits after reemployment separately on each
    period of employment.      The district court correctly concluded that the
    interpretation   by   IPERS   was   not   “irrational,   illogical,   or   wholly
    unjustified.” Id. § 17A.19(1)(l).
    IV.     Conclusion
    The decision by the district court on the petition for judicial review
    filed by Thoms was correct. IPERS correctly determined Thoms’ monthly
    benefits by calculating one annuity based on his initial employment, and
    adding to it a second annuity based on his reemployment. Accordingly,
    we affirm.
    AFFIRMED.