The Retirement Agency may not deny an individual who is a member of the Teachers' Retirement System or the Employees' Retirement System before December 1, 1973, the right to: Continue as a member of the Teachers' Retirement System or the Employees' Retirement System; or Receive the accrued benefits to which the member was entitled. Employees Enrolled in the Teachers' Retirement System in Error. An individual enrolled in the Teachers' Retirement System may continue as a member of the Teachers' Retirement System if the individual was enrolled before October 1, 1972, as a result of an administrative error. A recommendation of the Executive Director to remove an employee, enrolled for a period of 6 months or more after October 1, 1972, shall be submitted to the Board of Trustees for approval.