At the head of each department there shall be a full time or part time director. The City Manager, with approval of Council, shall appoint the directors of all departments, other than the Director of the Department of Law, who shall be appointed by Council. Each director shall be an administrative officer of the Municipality. He shall have supervision and control of the department he heads subject to the direction of the City Manager, except the Director of the Department of Law shall be subject to the direction of Council. With the approval of Council, the City Manager may serve as the head of one (1) or more such departments, except that he may not serve as Director of Finance, or he may appoint one (1) person as the head of two (2) or more departments.