Indiana Code Title 36. Local Government § 36-8-5-10

Sec. 10. (a) Except as provided in subsection (b) or (c), a member on leave under either section 2 or section 3 of this chapter is entitled to be credited with time spent in full-time employment for all purposes, including retirement and pension benefits.

(b) A member of the 1925 fund, the 1937 fund, the 1953 fund, or the 1977 fund who is granted an unpaid leave of absence under the Family Medical Leave Act of 1993 (29 U.S.C. 2601 et seq.) shall be credited with time spent on leave for the purposes of benefit eligibility and vesting to the extent required by the Family Medical Leave Act.  The member shall not receive credit for purposes of accruing additional benefits, except to the extent required by the Family Medical Leave Act.

(c) This subsection applies to a member of the 1925 fund, the 1937 fund, the 1953 fund, or the 1977 fund who is granted a leave of absence for service in an elected office under section 2 of this chapter.  In order to receive service credit in the 1925 fund, the 1937 fund, the 1953 fund, or the 1977 fund for the period of the leave of absence, the member must pay to the applicable fund for or during the leave the assessment or contribution that the member would have paid during the period of the leave had the member not been on the leave during that time.  The member's employer may pay all or a part of the assessment or contribution for the member.