Before the beginning of each fiscal year, the head of each office and department shall submit to the Mayor, at a time designated by him, an estimated budget for the coming fiscal year, which estimate shall show the requested allotments of the appropriations and estimated income for such office or department for the entire calendar year. The Mayor shall then request Council to determine and approve the budget for each office or department and the aggregate of such allotments, as approved by Council, shall not exceed the total estimated funds available to all offices and departments for the fiscal year. (Amended 11-2-65)