(c) An employee who elects under division (b) to again become a member of the retirement system 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 The employee may, in accordance with section 18304, repay contributions withdrawn under division (a) and may, as permitted under other relevant retirement system law, rule and policy, repay other refunded contributions.

(d) An employee who, having elected to again become a member under the retirement system under division (c), later elects again not to be a member may not thereafter become a member under the retirement system while employed by the same participating local district.

(2) An employee who elects to be covered under a plan provided by the employer under section 18252-B may later elect to become a member under the retirement system.

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

(b) An employee who joins the retirement system under this subparagraph may not pay contributions or have pick-up contributions made on or receive any service credit for the period during which the employee elected not to be a member of the retirement system.

(c) An employee who, having elected to become a member under the retirement system under this