No employee member of the retirement system shall be retired on pension except as hereinafter provided until he shall have paid in full the amount of all assessments for arrears and interest thereon. The amount of any assessment for arrears and interest thereon remaining unpaid upon a member's death or retirement for permanent or total disability shall be deducted from the amounts first allowable by way of pension prior to any payment by way of pension to a widow, widower, minor child, dependent parent or member retired for permanent or total disability.
N.J.S. § 43:13-22.15c