The City Attorney shall be the head of the Department of Law, and shall be appointed by the Mayor with the approval of the Council by a majority vote of its members, to serve for a term of one year commencing on the first day of January of each year. He shall serve until his successor is appointed and qualified. He shall be an attorney duly admitted to practice in this State. He shall be the legal advisor, attorney and counsel for the City and for all officers and departments thereof in matters relating to their official duties. He shall prepare all contracts, bonds, and other instruments in writing in which the City is concerned, and no contract with the City shall take effect until his approval of the form and correctness thereof is endorsed thereon. He shall also be Prosecuting Attorney of the Municipal Court and shall perform the duties which are imposed upon city solicitors by the general laws of the State, but he shall not be required to prosecute any action before the Municipal Court for the violation of any law or ordinance without first advising such action. The Mayor shall fix the salary of the City Attorney with the approval of Council by a majority vote of its members.