City of Somerville v. Commonwealth Employment Relations Board , 470 Mass. 563 ( 2015 )


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    SJC-11620
    CITY OF SOMERVILLE & another1 vs. COMMONWEALTH EMPLOYMENT
    RELATIONS BOARD & others.2
    Suffolk.     November 3, 2014. - February 3, 2015.
    Present:   Gants, C.J., Spina, Cordy, Botsford, Duffly, Lenk, &
    Hines, JJ.
    School and School Committee, Retirement benefits, Group
    insurance, Collective bargaining. Municipal Corporations,
    Group insurance, Collective bargaining. Retirement.
    Public Employment, Retirement benefits, Collective
    bargaining. Insurance, Group.
    Appeal from a decision of the Division of Labor Relations.
    The Supreme Judicial Court on its own initiative
    transferred the case from the Appeals Court.
    Matthew J. Buckley, Assistant City Solicitor, for the
    plaintiffs.
    T. Jane Gabriel for the defendant.
    Laurie R. Houle, Ira Fader, Colin R. Confoey, & Jason
    Powalisz for the interveners, submitted a brief.
    1
    School Committee of Somerville.
    2
    Somerville Teachers Association, Somerville Police
    Superior Officers Association, Somerville Administrators
    Association, and Somerville Municipal Employees Association,
    interveners.
    2
    SPINA, J.   At issue in this case is whether the city of
    Somerville (city) and the school committee of Somerville (school
    committee) violated G. L. c. 150E, § 10 (a) (5), and,
    derivatively, G. L. c. 150E, § 10 (a) (1), when the city
    unilaterally reduced its percentage contribution to retired
    employees' health insurance premiums without engaging in
    collective bargaining over the matter with current employees.3
    We conclude that the city and the school committee did not
    violate these statutory provisions.    Accordingly, we reverse the
    decision of the Commonwealth Employment Relations Board (board),
    which reached a contrary conclusion.
    1.    Statutory framework.   Our resolution of the present
    dispute is based on the interplay between G. L. c. 150E and
    G. L. c. 32B.    General Laws c. 150E, § 2, protects the rights of
    public employees to self-organization and collective bargaining.
    Pursuant to G. L. c. 150E, § 6, "[t]he employer and the
    exclusive representative . . . shall negotiate in good faith
    with respect to wages, hours, standards [of] productivity and
    performance, and any other terms and conditions of employment
    . . . ."    General Laws c. 150E, § 10, states, in relevant part:
    "(a) It shall be a prohibited practice for a public
    employer or its designated representative to:
    3
    A municipality and a school committee are a single entity
    for purposes of collective bargaining. See City of Malden, 23
    M.L.C. 181, 183-184 (1997).
    3
    "(1) Interfere, restrain, or coerce any employee in
    the exercise of any right guaranteed under this chapter;
    ". . .
    "(5) Refuse to bargain collectively in good faith with
    the exclusive representative as required in section six
    . . . ."
    "Under the Home Rule Amendment, art. 89, § 6, of the
    Amendments to the Massachusetts Constitution, municipalities of
    the Commonwealth may choose to provide health insurance coverage
    to their employees."   Twomey v. Middleborough, 
    468 Mass. 260
    ,
    261 (2014).   See Cioch v. Treasurer of Ludlow, 
    449 Mass. 690
    ,
    695 (2007).   General Laws c. 32B is a so-called "local option"
    statute that governs the provision of health insurance to active
    and retired employees of a municipality once that entity has
    voted to accept the terms of the statute.4   See Twomey v.
    Middleborough, supra; Yeretsky v. Attleboro, 
    424 Mass. 315
    , 316
    (1997).   See generally D.A. Randall & D.E. Franklin, Municipal
    Law and Practice § 10.25 (5th ed. 2006 & Supp. 2014).   When
    enacted, see St. 1956, c. 730, § 1, G. L. c. 32B, §§ 1 and 3,
    authorized municipalities to offer certain eligible persons and
    their dependents group indemnity health insurance coverage.
    Beginning in 1971, municipalities were given the option of
    making available to such individuals the services of a health
    4
    For the sake of simplicity, we use the term "municipality"
    in this opinion to refer to the counties, cities, towns, and
    districts covered by G. L. c. 32B.
    4
    maintenance organization (HMO) by accepting G. L. c. 32B, § 16,
    inserted by St. 1971, c. 946, § 5.
    Pursuant to G. L. c. 32B, § 9, retirees bear the full cost
    of their health insurance premiums unless a municipality has
    accepted the more generous provisions of G. L. c. 32B, § 9A or
    § 9E.     If a municipality accepts G. L. c. 32B, § 9A, then it may
    elect to pay fifty per cent of a retiree's premium for health
    insurance coverage.    If a municipality accepts G. L. c. 32B,
    § 9E, then it may elect to pay "a subsidiary or additional rate"
    greater than fifty per cent of a retiree's health insurance
    premium.
    2.    Factual and procedural background.   We summarize the
    relevant facts as stipulated by the parties in lieu of a hearing
    before the board.     The city is a public employer within the
    meaning of G. L. c. 150E, § 1.     The school committee is the
    collective bargaining agent of the city for the purpose of
    dealing with school employees.     The Somerville Teachers
    Association, Somerville Police Superior Officers Association,
    Somerville Administrators Association, and Somerville Municipal
    Employees Association (collectively, the unions) are employee
    organizations within the meaning of G. L. c. 150E, § 1,5 and they
    5
    General Laws c. 150E, § 1, defines an "[e]mployee
    organization" as "any lawful association, organization,
    federation, council, or labor union, the membership of which
    includes public employees, and assists its members to improve
    their wages, hours, and conditions of employment."
    5
    are the exclusive bargaining representatives for various
    individuals employed by the school committee and the city.
    In 1979, the city accepted G. L. c. 32B, § 9E, by a vote of
    the board of aldermen, thereby authorizing the city to pay more
    than fifty per cent of a retired employee's monthly premium for
    an indemnity health insurance plan.   From that point forward
    until August 1, 2009, the city contributed ninety-nine per cent
    of the premium for a retired employee's health insurance
    coverage under the indemnity plan offered by the city.     Retired
    employees contributed the remaining one per cent of the premium.
    In addition, the city offered active and retired employees
    health insurance coverage through several HMOs.   The city paid
    fixed percentages of the total premium costs, which varied
    between eighty and ninety per cent, depending on the particular
    plan.    Employees and retirees paid the remainder of the premium
    costs.
    On or about July 1, 2009, the city had approximately 1,262
    retirees who were participating in the city's group health
    insurance plans.    The majority of these individuals had retired
    from positions in the unions' bargaining units.   Effective
    August 1, 2009, the city decreased the percentage of its
    contribution for retired employees' health insurance coverage
    under the indemnity plan from ninety-nine per cent to sixty per
    cent, and it decreased the percentage of its contribution for
    6
    retired employees' health insurance coverage under all other
    insurance plans to seventy-five per cent.   These changes were
    approved by the board of aldermen after a properly noticed
    public hearing at which the new rates were proposed by the
    mayor.6
    Neither the city nor the school committee provided the
    unions with notice of or an opportunity to bargain over the
    decision to change contribution rates.   None of the collective
    bargaining agreements between the city and the various
    bargaining units addressed the contribution rates for retired
    employees' health insurance coverage, and such rates had never
    been a subject of negotiation between the city and the
    bargaining units.   At all material times, the city has
    maintained that the authority to set the contribution rates for
    retirees' health insurance coverage is vested exclusively with
    the board of aldermen and the mayor, and that such contribution
    rates are not a mandatory subject of bargaining with current
    employees.
    On September 10, 2009, the Somerville Teachers Association
    filed two prohibited practice charges with the division of labor
    6
    According to the city of Somerville (city), the board of
    aldermen voted to amend the city's 1979 acceptance of G. L.
    c. 32B, § 9E, thereby allowing the city to reduce its health
    insurance contribution rates for retirees.
    7
    relations (division).7   It alleged that the city and, separately,
    the school committee had violated G. L. c. 150E, § 10 (a) (5),
    and, derivatively, G. L. c. 150E, § 10 (a) (1), by "failing to
    provide notice and an opportunity to bargain over the future
    benefits [on retirement] of active employees when the City
    announced at the meeting of the Board of Aldermen, on May 28,
    2009 that effective August 1, 2009 the percentage contribution
    rate for all retirees would be increased."8   Based on essentially
    the same grounds, the Somerville Police Superior Officers
    Association filed a prohibited practice charge with the division
    on December 21, 2009; the Somerville Administrators Association
    filed two prohibited practice charges with the division on
    January 26, 2010;9 and the Somerville Municipal Employees
    Association filed a prohibited practice charge with the division
    on April 13, 2010.   The division investigated the allegations
    and found probable cause to believe that statutory violations
    had occurred.   The division issued complaints with respect to
    all six matters, and, on July 30, 2010, they were consolidated
    7
    The division of labor relations is now the Department of
    Labor Relations. See St. 2011, c. 3, § 36.
    8
    In its prohibited practice charge against the city, the
    Somerville Teachers Association (association) also alleged that
    the city had failed to provide certain health insurance
    information that was reasonable and necessary for the
    association to fulfil its obligations under the law. It
    subsequently withdrew this claim on February 18, 2011.
    9
    One prohibited practice charge was against the city, and
    the other was against the school committee of Somerville.
    8
    for hearing.   Pursuant to G. L. c. 150E, § 11 (f), the parties
    petitioned to have the consolidated complaints heard by the
    board in the first instance (rather than by a hearing officer),10
    and the request was granted.   The parties then stipulated to the
    facts.
    By decision dated October 19, 2011, the board concluded
    that the city and the school committee had failed to satisfy
    their statutory bargaining obligations before unilaterally
    reducing contributions for retired employees' health insurance
    premiums.   In the board's view, health insurance contributions
    for municipal retirees are a mandatory subject of bargaining.
    The board rejected the city's claims that current employees have
    no right to bargain over such contributions made on behalf of
    retirees, and that, pursuant to G. L. c. 32B, health insurance
    rates for retirees must be established through the local
    governmental process, not the collective bargaining process.
    The board ordered the city and the school committee to
    cease and desist from failing and refusing to bargain
    collectively in good faith with the unions over changes to
    future retirees' health insurance contribution rates.   Further,
    the board ordered the city and the school committee to restore
    the terms of the retirement health insurance benefit that was in
    10
    The Commonwealth Employment Relations Board (board) is
    the body within the division of labor relations that is charged
    with reviewing orders from investigators and issuing decisions.
    See G. L. c. 23, § 9R; G. L. c. 150E, § 11.
    9
    effect prior to August 1, 2009, for the unions' bargaining unit
    members who were active employees before that date and retired
    thereafter.   In addition, the board ordered the city and the
    school committee to make whole those bargaining unit members who
    retired after August 1, 2009, for any losses they may have
    suffered as a result of the unilateral change in retirement
    health insurance contribution rates, plus interest.    The city
    and the school committee appealed the board's decision, the case
    was entered in the Appeals Court, and we transferred it to this
    court on our own motion.
    3.   Standard of review.   We review the board's decision in
    accordance with the standards set forth in G. L. c. 30A,
    § 14 (7), governing appeals from final administrative agency
    decisions.    See G. L. c. 150E, § 11 (i).   See also Worcester v.
    Labor Relations Comm'n, 
    438 Mass. 177
    , 180 (2002).    The board's
    decision will be set aside only if it is "[a]rbitrary or
    capricious, an abuse of discretion, or otherwise not in
    accordance with law."   G. L. c. 30A, § 14 (7) (g).   We defer to
    the board's specialized knowledge and expertise.    See Worcester
    v. Labor Relations Comm'n, supra.   However, the duty of
    statutory interpretation rests ultimately with the courts.     See
    Commerce Ins. Co. v. Commissioner of Ins., 
    447 Mass. 478
    , 481
    (2006), citing Cleary v. Cardullo's, Inc., 
    347 Mass. 337
    , 343-
    344 (1964).
    10
    4.   Discussion.   The thrust of the arguments made by the
    city and the school committee is that current public employees
    do not have the right to bargain collectively over the issue of
    health insurance contribution rates for retirees.    They contend
    that, pursuant to G. L. c. 32B, such contribution rates are to
    be determined solely by the local government.    In their view, a
    contrary conclusion would give the unions veto power over
    decisions made by a municipality acting in accordance with its
    statutory authority.   Therefore, they continue, neither the city
    nor the school committee violated G. L. c. 150E, § 10 (a) (5),
    and, derivatively, G. L. c. 150E, § 10 (a) (1), when the city
    unilaterally reduced its percentage contributions to retirees'
    health insurance premiums.   We agree.
    When Congress enacted the National Labor Relations Act in
    1935, it exempted public employers -- States and their political
    subdivisions -- from the obligation to engage in collective
    bargaining.   See 
    29 U.S.C. § 152
    (2) (2012).    See also Brookfield
    v. Labor Relations Comm'n, 
    443 Mass. 315
    , 326 n.5 (2005).
    States and their political subdivisions were "free to regulate
    their labor relationships with their public employees."
    Davenport v. Washington Educ. Ass'n, 
    551 U.S. 177
    , 181 (2007).
    However, as was the case in most States, public employees in the
    Commonwealth "had virtually none of the rights that had been
    widely guaranteed since the nineteen thirties to employees in
    11
    private business to organize and bargain collectively and to be
    protected in the associated activities of asserting and
    negotiating grievances."    Dedham v. Labor Relations Comm'n, 
    365 Mass. 392
    , 396 (1974).    "[T]raditional hostility to
    organizational rights on the part of public employees gradually
    diminished in the post-war period, and in 1958 Massachusetts was
    among the first States . . . to afford a measure of recognition
    to those rights."   
    Id. at 397
    .   See St. 1958, c. 460, inserting
    G. L. c. 149, § 178D.    See also St. 1964, c. 637, inserting
    G. L. c. 149, § 178F; St. 1965, c. 763, § 2, inserting G. L.
    c. 149, §§ 178G-178N.    In 1973, the public sector collective
    bargaining law, G. L. c. 149, §§ 178D, 178F-178N, was repealed
    and replaced with G. L. c. 150E, see St. 1973, c. 1078, §§ 1, 2,
    as comprehensive legislation designed to provide organizational
    and collective bargaining rights to public employees.11   See
    11
    Historically speaking, "the subjects of public sector
    collective bargaining are more restricted than those in private
    sector labor relations." School Comm. of Boston v. Boston
    Teachers Union, Local 66, 
    378 Mass. 65
    , 70 (1979). See, e.g.,
    G. L. c. 150E, § 9A (a) (prohibiting public employees and their
    organizations from engaging in strikes). "'Public policy,
    whether derived from, and whether explicit or implicit in
    statute or decisional law, or in neither' may limit the ability
    of a public employer . . . to bind itself to a given contractual
    provision or to delegate to an arbitrator the power to bind it."
    School Comm. of Boston v. Boston Teachers Union, Local 66,
    
    supra,
     quoting School Comm. of Hanover v. Curry, 
    369 Mass. 683
    ,
    685 (1976). "While this principle may be raised in varied
    contexts . . . the analysis to be utilized is essentially the
    same in all instances: whether the ingredient of public policy
    in the issue subject to dispute is so comparatively heavy that
    collective bargaining . . . on the subject is, as a matter of
    12
    Labor Relations Comm'n v. Boston Teachers Union, Local 66, 
    374 Mass. 79
    , 93-95 (1977); Gallagher v. Metropolitan Dist. Comm'n,
    
    371 Mass. 691
    , 693 (1977).   Thus, the scope of matters for
    negotiation has been defined, albeit somewhat broadly, by the
    Legislature.
    General Laws c. 150E, § 6, provides that the public
    employer and the employee organization "shall negotiate in good
    faith with respect to wages, hours, standards [of] productivity
    and performance, and any other terms and conditions of
    employment."   These matters, subject to limited exceptions, are
    deemed to be mandatory subjects of bargaining.12   See Local 1652,
    Int'l Ass'n of Firefighters v. Framingham, 
    442 Mass. 463
    , 467
    (2004).   See also Worcester v. Labor Relations Comm'n, 438 Mass.
    at 180-181 (certain types of managerial decisions must, as
    matter of policy, be reserved for public employer's discretion).
    The failure of a public employer to negotiate in good faith over
    law, to be denied effect." Id. at 70-71. "Underlying this
    development is the belief that, unless the bargaining
    relationship is carefully regulated, giving public employees the
    collective power to negotiate labor contracts poses the
    substantial danger of distorting the normal political process
    for controlling public policy." Id. at 71.
    12
    It has been observed by appellate courts that "[a]ny
    attempt to define with precision and certainty the subjects
    about which bargaining is mandated by [c.] 150E is doomed to
    failure." Lynn v. Labor Relations Comm'n, 
    43 Mass. App. Ct. 172
    , 177 (1997), quoting Greenbaum, The Scope of Mandatory
    Bargaining Under Massachusetts Public Sector Labor Relations
    Law, 
    72 Mass. L. Rev. 102
    , 102 (1987). See Local 2071, Int'l
    Ass'n of Firefighters v. Bellingham, 
    67 Mass. App. Ct. 502
    , 522
    (2006) (Mills, J., dissenting), S.C., 
    450 Mass. 1011
     (2007).
    13
    mandatory subjects of bargaining is a prohibited practice.     See
    G. L. c. 150E, § 10 (a) (5).   See also Commonwealth v. Labor
    Relations Comm'n, 
    404 Mass. 124
    , 127 (1989) ("A public employer
    has a duty to bargain in good faith and, short of impasse, it
    may not unilaterally implement changes to a mandatory subject of
    bargaining without negotiation"); School Comm. of Newton v.
    Labor Relations Comm'n, 
    388 Mass. 557
    , 572 (1983).   The
    commission of a prohibited practice is remediable through the
    enforcement procedures set forth in G. L. c. 150E, § 11.
    The issue here is whether the city's contribution rate for
    retired employees' health insurance coverage is a mandatory
    subject of bargaining such that its unilateral reduction
    constitutes a prohibited practice in violation of G. L. c. 150E,
    § 10 (a) (5).   As a general proposition, health insurance
    coverage for public employees is "an unearned benefit, no
    different in concept from holidays, future sick leave, or other
    similar benefits."   Larson v. School Comm. of Plymouth, 
    430 Mass. 719
    , 724 (2000).   "As an unearned benefit, health
    insurance, like 'wages, hours . . . and . . . other terms and
    conditions of employment' is subject to mandatory collective
    bargaining between public employers and public employees."
    Massachusetts Nurses Ass'n v. Cambridge Pub. Health Comm'n, 
    82 Mass. App. Ct. 909
    , 911 (2012), quoting School Comm. of Medford
    v. Labor Relations Comm'n, 
    8 Mass. App. Ct. 139
    , 140 (1979),
    
    14 S.C., 380
     Mass. 932 (1980).   See Anderson v. Selectmen of
    Wrentham, 
    406 Mass. 508
    , 511 (1990) (municipality's contribution
    to unionized employees' group health insurance premiums is
    mandatory subject of collective bargaining).   The language of
    G. L. c. 150E, § 6, governs the terms and conditions of the
    public employee's existing employment.   It goes without saying
    that a retiree cannot bargain over the percentage contributions
    made by a municipality to the retiree's health insurance
    premiums, given that the retiree is no longer employed.    With
    respect to current employees, a municipality's contributions to
    the health insurance premiums of retirees is not a term or
    condition of employment that is subject to mandatory collective
    bargaining where the Legislature expressly has conferred
    authority over the provision of such a benefit on the
    municipality.
    The Legislature, by way of G. L. c. 32B, § 9, has stated
    that retirees "shall pay the full premium cost" of their health
    insurance, subject to the provisions of either G. L. c. 32B,
    § 9A, or G. L. c. 32B, § 9E, which, if accepted by a
    municipality, permits the municipality to pay a portion of the
    retirees' premiums.   The authority conferred on a municipality
    to decide whether and how much to contribute to the monthly
    health insurance premiums of retired employees (within defined
    statutory percentages) would be wholly undermined by an
    15
    obligation to collectively bargain the matter.   See, e.g.,
    Somerville v. Somerville Mun. Employees Ass'n, 
    451 Mass. 493
    ,
    494 (2008) (explicit legislative directive of G. L. c. 115,
    § 10, that city's director of veterans' services "shall be
    appointed . . . by the mayor, with the approval of the city
    council," precluded challenged appointment from being proper
    subject of collective bargaining); National Ass'n of Gov't
    Employees v. Commonwealth, 
    419 Mass. 448
    , 453, cert. denied, 
    515 U.S. 1161
     (1995) (where Legislature reserved for itself in G. L.
    c. 32A, § 8, power to change percentage of Commonwealth's
    agreed-to contribution to employees' health insurance premiums,
    such reserved power could not be overridden by collective
    bargaining); Watertown Firefighters, Local 1347, I.A.F.F. v.
    Watertown, 
    376 Mass. 706
    , 714 (1978) (characterization of matter
    as term or condition of employment does not require its
    submission to collective bargaining if to do so will "defeat[] a
    declared legislative purpose").   See generally Energy Reserves
    Group, Inc. v. Kansas Power & Light Co., 
    459 U.S. 400
    , 411
    (1983), quoting Hudson Water Co. v. McCarter, 
    209 U.S. 349
    , 357
    (1908) ("One whose rights . . . are subject to [S]tate
    restriction, cannot remove them from the power of the State by
    making a contract about them").
    Except as provided in G. L. c. 150E, § 7 (d), which we
    shall discuss next, "[t]here is no obligation to engage in
    16
    collective bargaining as to matters controlled entirely by
    statute."   Lynn v. Labor Relations Comm'n, 
    43 Mass. App. Ct. 172
    , 183 (1997).13   See Commonwealth v. Labor Relations Comm'n,
    404 Mass. at 126; National Ass'n of Gov't Employees, Local R1-
    162 v. Labor Relations Comm'n, 
    17 Mass. App. Ct. 542
    , 544
    (1984).   Here, current public employees cannot bargain over how
    the city should exercise the authority conferred on it by G. L.
    c. 32B, § 9E, because such bargaining effectively would negate
    the Legislature's purpose in entrusting the matter to the city.
    See Lynn v. Labor Relations Comm'n, supra at 184.     Cf. Twomey v.
    Middleborough, 468 Mass. at 271 (board of selectmen has
    statutory authority to establish percentage of total monthly
    premium for HMO coverage that is to be paid by town's retired
    employees); Yeretsky v. Attleboro, 424 Mass. at 323-324
    (municipal contribution rate for HMO premiums for retired
    nonunionized employees determined at local government level).
    In our view, the Legislature conferred authority on
    municipalities to decide whether and how much to contribute to
    13
    In Lynn v. Labor Relations Comm'n, 43 Mass. App. Ct. at
    182, the Appeals Court cogently explained: "In the range of
    cases where the governmental employer acts pursuant to broad,
    general management powers, the danger is presented, as pointed
    out in School Comm. of Newton v. Labor Relations Comm'n, 388
    Mass. [557,] 564-566 [(1983)], that to recognize the statutory
    authority as exclusive would substantially undermine the purpose
    of G. L. c. 150E, § 6, to provide for meaningful collective
    bargaining as a general rule with respect to compensation and
    other terms and conditions of employment. That danger simply is
    not present when the governmental employer acts pursuant to a
    specific, narrow statutory mandate."
    17
    retirees' health insurance premiums in recognition of the fact
    that, as public employers, they must balance the needs of their
    retired workers with the burdens of safeguarding their own
    fiscal health, thereby ensuring their ability to provide
    services for all of their citizens.
    If we were to conclude that the city's percentage
    contribution to retirees' health insurance premiums is a
    mandatory subject of bargaining, we would have to confront the
    import of the so-called "conflicts" statute, G. L. c. 150E,
    § 7 (d).   See Adams v. Boston, 
    461 Mass. 602
    , 607-608 (2012).
    General Laws c. 150E, § 7 (d), provides that, with respect to
    matters within the scope of negotiations under G. L. c. 150E,
    § 6, the terms of a collective bargaining agreement prevail over
    contrary terms in certain enumerated statutes.   See Adams v.
    Boston, 
    supra;
     Chief Justice for Admin. & Mgt. of the Trial
    Court v. Office & Professional Employees Int'l Union, Local 6,
    
    441 Mass. 620
    , 625-626 (2004).   Generally speaking, those
    enumerated statutes "contain specific mandates regarding terms
    and conditions of employment of public employees."   Adams v.
    Boston, 
    supra
     at 607 n.11.   See G. L. c. 150E, § 7 (d); School
    Comm. of Newton v. Labor Relations Comm'n, 
    388 Mass. at 566
    .
    General Laws c. 32B, § 9E, is not among the enumerated statutes.
    It is well established that "statutes not specifically
    enumerated in § 7 (d) will prevail over contrary terms in
    18
    collective bargaining agreements."     Commonwealth v. Labor
    Relations Comm'n, 404 Mass. at 126.    See Chief Justice for
    Admin. & Mgt. of the Trial Court v. Office & Professional
    Employees Int'l Union, Local 6, 
    supra;
     School Comm. of Natick v.
    Education Ass'n of Natick, 
    423 Mass. 34
    , 39 (1996).     "There is
    no duty to bargain over the specific requirements of such
    statutes."   Commonwealth v. Labor Relations Comm'n, supra.    As
    pertinent to the present case, even if the city's contribution
    to retirees' health insurance premiums was deemed to be a
    mandatory subject of collective bargaining, the provisions of
    G. L. c. 150E, § 9E, would prevail, and the city could
    unilaterally change the percentage of its contribution in
    accordance with the statute.     See National Ass'n of Gov't
    Employees, Local R1-162 v. Labor Relations Comm'n, 17 Mass. App.
    Ct. at 544 (where statute not listed in G. L. c. 150E, § 7 [d],
    public employer and union cannot amend statute's requirements
    through collective bargaining).
    5.   Conclusion.   The city and the school committee did not
    violate G. L. c. 150E, § 10 (a) (5), or, derivatively, G. L.
    c. 150E, § 10 (a) (1), when the city unilaterally reduced its
    percentage contribution to retired employees' health insurance
    premiums without engaging in collective bargaining over the
    matter with current employees.    Accordingly, the decision of the
    board is reversed.
    19
    So ordered.