§ 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.