§ 41. Executive functions; how performed. Whenever an executive or
administrative function is by law or ordinance of the common council
required to be performed, the same shall be performed by the proper
executive or administrative officer or department, designated in the law
or ordinance, and in case no such designation be thus made the mayor
shall make the same, but no ordinance shall be passed interfering with
the exercise of the executive functions of the officers, departments and
boards of the city, as provided in this chapter or otherwise by law.