The Law Director shall prepare all contracts, bonds and other instruments in writing in which the City is concerned. He or she shall be the chief legal adviser of all offices, departments, commissions, boards and agencies and of all officers and employees of the City in matters relating to their official powers and duties. He or she shall represent the City in all legal proceedings and shall serve as prosecuting attorney in the Municipal Court. Further, it shall be his or her duty to perform all services incident to his or her office as may be required by statute, by this Charter or by ordinance. The Law Director may, with the approval of Council, retain such assistance as may be necessary in the performance of these duties.