The provisions of this Charter shall become effective January 1, 1965. All officers and members of boards and commissions holding office on December 31, 1964, shall continue in office and in the performance of duties until provisions shall have been otherwise made in accordance with this Charter for the performance or discontinuance of the duties of any such office. Every employee of the Municipal Government on December 31, 1964, shall continue in such employment subject to the provisions of this Charter.