(a) Pursuant to W.S. 9-3-415(c) and subject to subsection (b) of this section, any retired member of the system may be rehired by a member employer and shall either:
(b) If a retired member of the system is rehired by an employer covered under the system on a full-time, permanent basis within six (6) months from the date of payment of the first monthly retirement benefit under the system following retirement, that member shall immediately have his benefit payment canceled and shall be reinstated as a contributing member of the system, except that within the six (6) month period a retired member may be reemployed by a covered employer under the system, after a thirty (30) day break in service, and continue to receive a retirement benefit pursuant to subsection (a) (ii) of this section if the retired member is reemployed:
(c) Any retired member who violates subsection (b) of this section shall immediately have his benefit payment canceled and shall be reinstated as a contributing member of the system.
072-12 Wyo. Code R. § 12-2