N.Y. Pub. Health Law § 376

§ 376. Certain cities; enforcement. The head of the police department\nshall whenever requested in writing by the commissioner of health or\nhealth officer in cities having a population of less than one hundred\nseventy-five thousand, with the approval of the mayor, detail such\nnumber of regular police officers as shall be specified in such request\nwho shall while so detailed serve under the direction of the\ncommissioner of health or health officer.\n