The Retirement Quick Guide will walk you through what to expect as your retirement application is processed and your benefits are determined. The following chart outlines the requirements for an immediate annuity under the Federal Employees.Retirement System (FERS). Pension is payable on retirement after attaining the age of compulsory retirement (superannuation) or in advance of this age under certain circumstances. (a), a Government servant shall give a notice in writing to the appointing authority at least three months before the date on which he wishes to retire; and. CHAPTER:- II. General Conditions. 5. Claims to pension or family pension. 6. To do so, TRS must receive your retirement application no later than July 31, and you must terminate employment on or before June 15.