Section 25-305 - Purchase of service credit at member's cost(a) A member may purchase service credit as provided in subsection (b) of this section for periods of employment for which the member: (1)(i) would have been entitled to purchase service credit under the Employees' Retirement System; and(ii) is not otherwise entitled to service credit under the Correctional Officers' Retirement System; or(2) was not vested in the Employees' Pension System.(b)(1) A member who purchases service credit under this section shall: (i) complete a claim for the service credit and file it with the Board of Trustees on a form that the Board of Trustees provides; and(ii) pay to the Board of Trustees in a single payment the member contributions the member would have made for the period of employment for which service credit is being purchased plus regular interest to the date of payment.(2) A member may pay for service credit purchased under this section at any time before retirement.