(2) An employee who elects not to remain a member under the retirement system may later elect to again become a member.

(a) Membership service credit for an employee who elects to again become a member under the retirement system under this subparagraph begins as of the effective date of the first contributions or pick-up contributions to the retirement system following the employee's election under this subparagraph.

(b) An employee who rejoins the retirement system under this subparagraph may not pay contributions or pick-up contributions or receive service credit for the period during which the employee elected not to be a member under the retirement system. The employee may, in accordance with section 18304, repay contributions refunded under subparagraph (1), unless to so elect would have the effect of requiring the employer, without the employer's agreement, to make an employer contribution to both the retirement system and the plan provided by the employer under section 18252- B.

(c) An employee who, having elected to again become a member under the retirement system under this subparagraph, later elects again not to be a member shall may, at the employee's discretion, withdraw accumulated contributions in accordance with applicable requirements of law and rule and retirement system procedures and may not thereafter become a member under the retirement system while employed by the same participating local district.

Sec. 8. 5 MRSA §18360, first ¶, as amended by PL 1991, c. 479, §5, is further amended to read:

Service credit for service in the Armed Forces of the United States is governed as follows. Except as provided in subsection 1, paragraph B, subparagraph (1), service credit under this section is limited to 4 5 years.

Sec. 9. 5 MRSA §18360, sub-§1, as enacted by PL 1985, c. 801, §§5 and 7, is amended to read: