N.Y.C. Admin. Code § 13-344: § 13-344 Termination of membership; election to city, county or state office.

Should a member previously in city-service as a city official or employee be elected a city, county or state official, he or she may on application therefor and approval by the mayor, withdraw from the pension fund, and upon such withdrawal: (a) if he or she is an original plan member, he or she shall be paid such part of the amount of the accumulated contributions (as defined in subdivision seven of section 13-313 of this subchapter), that is, his or her contributions without interest, standing to the credit of his or her individual account in the contingent reserve fund as he or she shall be entitled to receive; or (b) if he or she is an improved benefits plan member, he or she shall be paid such part of the accumulated deductions (as defined in subdivision seven-a of such section 13-313 of this subchapter) standing to the credit of his or her individual account in the annuity savings fund as he or she shall be entitled to receive.