N.Y.C. Admin. Code § 13-114: § 13-114 Credit for service with the port authority of New York and New Jersey.

Notwithstanding any provisions of section 13-107 of this chapter to the contrary, any person in city-service on the seventh day of April, nineteen hundred thirty who is or becomes a member of the New York city employees' retirement system shall be entitled to credit for all service by reason of his transfer to or service with the port of New York authority as a paid official, clerk or employee thereof, and shall be entitled to all the rights granted by this chapter; provided, however, that such member contribute to the retirement system the amount he or she would have been required to contribute if such service with the port authority of New York and New Jersey was rendered to the city while a member.