Section 4
SEC. 4. Every contributor to the Fund who is entitled -to retire under the provisions of the Teachers' Retirement and Disability Act, on or before November first, nineteen hundred and thirty-six, shall be entitled to the benefits under section three (a) hereof plus a gratuity at the rate of two per centum of the average annual salary received during the last three years of service preceding December thirty-first; nineteen hundred thirty-six for every year of service up to the said date, payable under the same conditions as the refund of the contributions prescribed herein.