N.Y.C. Admin. Code § 3-103: § 3-103 Apprehension and conviction of criminals.

The mayor, whenever he or she shall deem it necessary, may issue a proclamation offering a reward for information which shall lead to the apprehension or apprehension and conviction of any person who may have committed a crime within the city. In such proclamation, the mayor may offer a reward not exceeding five hundred dollars for the apprehension of any such person and not exceeding ten thousand dollars for the apprehension and conviction of any such person, provided, however, that the mayor may offer a reward not exceeding one hundred thousand dollars for the apprehension and conviction of any person found guilty in connection with an act of terrorism involving loss of life or substantial injury to persons or property. Any such reward shall be paid out of the city treasury upon a certificate of the mayor that the service required has been performed. For purposes of this section, "terrorism" means premeditated, politically motivated violence perpetrated against noncombatant targets by subnational groups or clandestine agents.