Pennsylvania Statutes Title 53 P.S. Municipal and Quasi-Municipal Corporations § 881.407. Superannuation retirement

(1) Any contributor who has reached superannuation retirement age may retire for superannuation by filing with the board a written statement, duly attested, setting forth on what date he desires to be retired.  Said application shall make the superannuation retirement allowance effective on the date so specified, if such application was filed in the office of the board or deposited in the United States mail, addressed to the board, before the date specified in the application and before the death of the contributor, but the date so specified in the application shall not be more than ninety days after the date of filing, or the date the application was deposited in the mail.

(2) On retirement for superannuation, a contributor shall be entitled to a retirement allowance throughout his life, which shall consist of an amount computed in accordance with the formula specified in the contract.