The monthly pension originally granted to any retirant shall be increased in accordance with the provisions of this act.
Pension increases shall not be paid to retirants who are not receiving their regular, full, monthly pensions. The increase granted under the provisions of this act shall be effective only on the first day of a month, shall be paid in monthly installments, and shall not be decreased, increased, revoked or repealed except as otherwise provided in this act. No increase shall be due to a retirant or his beneficiary unless it constitutes a payment for an entire month.
N.J.S. § 43:8B-10