N.Y.C. Admin. Code § 13-661: § 13-661 Limitations on obligations.

The supplemental retirement allowances provided pursuant to this article shall not constitute membership in a pension or retirement system nor shall the granting of such allowances create a contractual relationship between the city or a public authority and any city retired employee or between the city and any police or fire retired employee or between the city and any police or fire surviving spouse or dependent or between the city and any police or fire line-of-duty surviving spouse or dependent or between the city and any street cleaning surviving spouse or dependent.