After the budgets of the water and sanitary wastewater utilities have been adopted, should it appear that for either utility there will be revenues in excess of those budgeted:additional expenditures may be authorized by the Board of Estimates from the funds of that utility in an amount not exceeding such excess; or upon recommendation of the Directors of Finance and Public Works, the Board may decrease the utility rates and charges. Any such additional expenditures of the water or sanitary wastewater utility shall be subject to the appropriation procedures provided in <cite data-doc="City of Baltimore, Md., Charter" data-path="VI">Article VI of the City Charter</cite>. City Code, 1976/83, art. 29, §21A(a)(2nd par.) Ord. 78-941