The Mayor shall annually before each November 1 prepare and submit to the Board of Aldermen a proposed budget predicated as necessary to operate all branches of City government. The Board of Aldermen may reduce the proposed budget but may not increase it. (Amended 1997, No. M-17 (Adj. Sess.), § 8; 2009, No. M-6, § 3, eff. May 8, 2009.)