The existing Board of Public Affairs shall continue its existence and operation, with current duties, responsibilities, and authority, until March 30, 1982 at which time responsibility for all utility operation shall be placed on the Council and Manager, and the Board of Public Affairs shall become an advisory commission with regard to municipally-operated public utilities, to serve without compensation. It shall continue in this capacity until December 31, 1984, or such later date as the Council shall determine. The present members of the Board of Public Affairs shall continue in office for the terms for which they were elected. Thereafter the Mayor shall have the power to appoint members to the Board, subject to approval of the Council by majority vote.