N.Y. Second Class Cities Law § 12: Appointive officers

§ 12. Appointive officers. There shall be appointed by the mayor a

corporation counsel, city engineer, commissioner of public works,

commissioner of public safety, commissioner of public welfare and sealer

of weights and measures. The commissioner of public welfare shall be

appointed in accordance with the provisions of section one hundred

sixteen of the social welfare law. Other officers may be appointed as

provided in this chapter or otherwise by law. All appointments to any

city office shall be evidenced by a certificate in writing, signed by

the appointing officer and filed forthwith in the office of the city

clerk. If an appointment be made by the common council such certificate

shall be signed by the officer presiding at the time the appointment was

made and attested by the city clerk.