(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 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.

B. An employee of the participating local district who is a member under the retirement system on the date on which the employer provides a plan under section 18252-B may elect to remain a member under the retirement system or to become covered under a plan provided by the employer under section 18252-B.

(1) If the employee elects not to remain a member, the election is effective as of the first day of the month in which no contributions or pick-up contributions are made to the retirement system by the employee. An employee who elects not to remain a member shall may, at the employee's discretion, withdraw accumulated contributions in accordance with applicable