S.C. Code Ann. § 9-8-60
(1) A member of the system may retire upon written application to the board setting forth at what time, not later than the end of the calendar year in which the member attains age seventy-two and not more than ninety days prior nor more than six months subsequent to the execution and filing thereof, the member desires to be retired, if the member at the time so specified for retirement is no longer in the service of the State, except as a member of the General Assembly, and has completed ten years of credited service as a judge or eight years of credited service as a solicitor or was in service as a judge or solicitor on July 1, 1984, and has either attained the age of sixty-five and completed at least twenty years of credited service, or attained age seventy and completed at least fifteen years of credited service, or attained age sixty-five with at least four years' service in the position and has at least twenty-five years' other service with the State, or completed at least twenty-five years of credited service regardless of age. A solicitor is eligible to retire upon completion of twenty-four years of credited service regardless of age. A person is not eligible to receive a retirement allowance under this system while under employment covered by the South Carolina Retirement System and the South Carolina Police Officers Retirement System.
A person receiving retirement allowances under this system who is elected to the General Assembly continues to receive the retirement allowances while serving in the General Assembly and must also be a member of the General Assembly Retirement System unless the person files a statement with the State Budget and Control Board on a form prescribed by the board electing not to participate in the General Assembly Retirement System while a member of the General Assembly. A person making this election shall not make contributions to the General Assembly Retirement System nor shall the State make contributions on the member's behalf and the person is not entitled to benefits from the General Assembly Retirement System after ceasing to be a member of the General Assembly.