(a) This section applies to rollovers and transfers as specified in this section made on or after January 1, 2002. Notwithstanding any provision of this article to the contrary that would otherwise prohibit or limit rollovers and plan transfers to this system, the retirement system shall accept the following rollovers and plan transfers on behalf of a member solely for the purpose of purchasing permissive service credit, in whole or in part, as otherwise provided in this article or for the repayment of withdrawn or refunded contributions, in whole or in part, with respect to a previous forfeiture of service credit as otherwise provided in this article: (i) One or more rollovers within the meaning of Section 408(d)(3) of the Internal Revenue Code from an individual retirement account described in Section 408(a) of the Internal Revenue Code or from an individual retirement annuity described in Section 408(b) of the Internal Revenue Code; (ii) one or more rollovers described in Section 402(c) of the Internal Revenue Code from a retirement plan that is qualified under Section 401(a) of the Internal Revenue Code or from a plan described in Section 403(b) of the Internal Revenue Code; (iii) one or more rollovers described in Section 457(e)(16) of the Internal Revenue Code from a governmental plan described in Section 457 of the Internal Revenue Code; or (iv) direct trustee-to-trustee transfers or rollovers from a plan that is qualified under Section 401(a) of the Internal Revenue Code, from a plan described in Section 403(b) of the Internal Revenue Code or from a governmental plan described in Section 457 of the Internal Revenue Code: Provided, That any rollovers or transfers pursuant to this section shall be accepted by the system only if made in cash or other asset permitted by the board and only in accordance with the policies, practices and procedures established by the board from time to time. For purposes of this article, the following definitions and limitations apply:

(1) "Permissive service credit" means service credit which is permitted to be purchased under the terms of the retirement system by voluntary contributions in an amount which does not exceed the amount necessary to fund the benefit attributable to the period of service for which the service credit is being purchased, all as defined in Section 415(n)(3)(A) of the Internal Revenue Code: Provided, That no more than five years of "nonqualified service credit", as defined in Section 415(n)(3)(C) of the Internal Revenue Code, may be included in the permissive service credit allowed to be purchased (other than by means of a rollover or plan transfer), and no nonqualified service credit may be included in any such purchase (other than by means of a rollover or plan transfer) before the member has at least five years of participation in the retirement system.

(2) "Repayment of withdrawn or refunded contributions" means the payment into the retirement system of the funds required pursuant to this article for the reinstatement of service credit previously forfeited on account of any refund or withdrawal of contributions permitted in this article, as set forth in Section 415(k)(3) of the Internal Revenue Code.

(3) Any contribution (other than by means of a rollover or plan transfer) to purchase permissive service credit under any provision of this article must satisfy the special limitation rules described in Section 415(n) of the Internal Revenue Code, and shall be automatically reduced, limited or required to be paid over multiple years if necessary to ensure such compliance. To the extent any such purchased permissive service credit is qualified military service within the meaning of Section 414(u) of the Internal Revenue Code, the limitations of Section 415 of the Internal Revenue Code shall be applied to such purchase as described in Section 414(u)(1)(B) of the Internal Revenue Code.

(4) For purposes of Section 415(b) of the Internal Revenue Code, the annual benefit attributable to any rollover contribution accepted pursuant to this section shall be determined in accordance with Treasury Regulation §1.415(b)-1(b)(2)(v), and the excess, if any, of the annuity payments attributable to any rollover contribution provided under the retirement system over the annual benefit so determined shall be taken into account when applying the accrued benefit limitations of Section 415(b) of the Internal Revenue Code and section twenty-eight-a of this article.

(b) Nothing in this section shall be construed as permitting rollovers or transfers into this system or any other system administered by the retirement board other than as specified in this section and no rollover or transfer shall be accepted into the system in an amount greater than the amount required for the purchase of permissive service credit or repayment of withdrawn or refunded contributions.

(c) Nothing in this section shall be construed as permitting the purchase of service credit or repayment of withdrawn or refunded contributions except as otherwise permitted in this article.