New York Codes, Rules and Regulations
Title 2 - DEPARTMENT OF AUDIT AND CONTROL
Chapter VI - New York State and Local Employees' Retirement System and New York State and Local Police and Fire Retirement System
Part 381 - Article 22-membership Contributions And Withdrawals
Section 381.6 - Restoration of credit for previous service

Membership in the New York State and Local Police and Fire Retirement System shall cease upon withdrawal of contributions pursuant to these regulations. A former member who thereafter returns to public service shall not receive any credit for previous service to which such withdrawn and refunded contributions applied unless and until such former member applies for such credit and repays the entire amount withdrawn and refunded, together with interest through the date of repayment at the rate of five percent per annum.