Mississippi Administrative Code
Title 27 - Personnel
Part 210 - PERS, Regulations for Retirement Plans Administered by the Board of Trustees
Chapter 08 - Former employees with prior services re-entering State Employment (This applies to Retirement Annuity only and not to Social Security)
Section 27-210-08-101 - Former employees with prior service reentering state employment

Any former employee with prior service with any department of the State of Mississippi, or any County, Municipality, or any Subdivision or Instrumentality, who, after April 15, 1952, but prior to July 1, 1953, re-enters either the department for which prior service was performed, or any department, county, municipality, or instrumentality covered under the Public Employees' Retirement System and becomes a member of said Retirement System, shall be required to remain in service and contribute to said System for a period not less than four years before his certificate of prior service shall become final except in those cases where persons are prevented from completing the four year requirement because of total and permanent disability or because of having attained the compulsory retirement age of 70 years.