N.Y.C. Admin. Code § 13-212: § 13-212 Exemption from tax and legal process.

The right of a person to a pension, an allowance, to the return of contributions, the pension itself, any optional benefit, any other right accrued or accruing to any person under the provisions of this subchapter and the moneys in the fund provided for by this subchapter, are hereby exempt from any state or municipal tax, and shall not be subject to execution, garnishment, attachment, or any other process whatsoever, and shall be unassignable except as in this article specifically provided.