Annuity in excess of that fixed in Sections 9--126, 9--127 or 9--128 shall not be granted to any employee described therein, unless he re-entered service before age 65. If such re-entry occurs, his annuity shall be provided in accordance with Sections 9--125 to 9--128, inclusive, whichever are applicable.
40 ILCS 5/9-129