(a) At the time the Mayor prescribes, but not later than January 1 of each year, each board or officer at the head of any department or office, or other City governmental activity, other than those departments having control of their own funds, shall submit to the Mayor, with copies to the Council and the Director of the Office of Administrative and Research Services, on forms and in the manner prescribed by the Mayor, a detailed estimate of the money required for the next fiscal year for the proper operation of their departments and offices. These estimates shall contain uniform budget classifications and shall clearly set forth the functions performed and the items and services required for such performance. Summaries, schedules and supporting data shall be attached to the estimates. Any department head or officer requesting an increase over the prior year’s appropriation shall indicate which classifications need the increase and rank the order of immediate need for each classification. After consultation with an officer or head of a department, the Mayor may refer the estimate back with instructions to prepare a revised estimate on the basis of a maximum sum for the department, office or activity, that maximum sum to be fixed by the Mayor, or with further qualification as the Mayor shall determine. The officer or head of department shall present the revised estimate to the Mayor, with a duplicate to the Council and to the Director of the Office of Administrative and Research Services, at a date fixed by the Mayor.
(b) On or before February 1, the Mayor shall publish his or her budget priorities for the next fiscal year in order to facilitate public comment.
(c) On or before March 1 of each year the Controller shall submit to the Mayor, with a duplicate to the Council and to the Director of the Office of Administrative and Research Services, a detailed statement of the money that the Controller estimates will be required for the interest and sinking funds and for all outstanding bonded indebtedness and other lawful obligations of the City or of special districts and an estimate of the revenue to be derived from fines, licenses and other sources.