1. On and after October 13, 1965, all employees as defined in section 169.600 of districts included in this retirement system shall be members of the system by virtue of their employment, and all persons who had five years of prior service who were employees of districts included in sections 169.600 to 169.710 during the school year next preceding October 13, 1965, but who ceased to be employees prior to October 13, 1965, because of physical disability, shall be members of this system by virtue of that prior service. Individuals who qualify as independent contractors under the common law and are treated as such by their employer shall not be considered employees for purposes of membership in or contributions to the retirement system.

2. Any member who rendered service prior to November 1, 1965, as an employee as defined in section 169.600 in a district or community college district included in the system may claim credit for that service by filing with the board of trustees a complete and detailed record of the service for which the credit is claimed, together with such supporting evidence as the board may require for verification of the record. To the extent that the board finds the record correct, it shall credit the claimant with prior service and shall notify the claimant of its decision.

3. Membership shall be terminated by failure of a member to earn any membership service credit as a public school employee under this system for five consecutive school years, by death, withdrawal of contributions, or retirement.

4. If a member withdraws or is refunded the member’s contributions, the member shall thereby forfeit any creditable service the member may have; provided, however, if such person again becomes a member of the system, the member may elect prior to retirement to reinstate any creditable service forfeited at the times of previous withdrawals or refunds. The reinstatement shall be effected by the member paying to the retirement system, with interest, the amount of accumulated contributions withdrawn by the member or refunded to the member with respect to the service being reinstated. A member may reinstate less than the total service previously forfeited, in accordance with rules promulgated by the board of trustees. The payment shall be completed prior to termination of membership with the retirement system with interest on the unpaid balance; provided, however, that if a member is retired on disability before completing such payments, the balance due, with interest, shall be deducted from the member’s disability retirement allowance.

5. Any person who is an employee of any statewide nonprofit educational association or organization serving the active membership of the public education employee retirement system of Missouri and who works at least twenty hours per week on a regular basis in a position which is not covered by the public school retirement system of Missouri may be a member of the public education employee retirement system of Missouri. Certificated employees of such statewide nonprofit educational association or organization may not be members of the public school retirement system of Missouri unless such association or organization makes separate application pursuant to subsection 4 of section 169.130. The contributions required to be made by the employee will be deducted from salary and matched by the association or organization. After June 30, 2010, no additional nonprofit educational associations or organizations may have their employees^* become members of the public school retirement system of Missouri or the public education employee retirement system of Missouri.