Expenditure control. If at any time during the budget year the Business
Administrator shall ascertain that the available revenue, plus balances
for the year, will be less than the total appropriations, he shall
reconsider the work programs and allotments of the several offices,
departments, divisions and agencies. Upon such reconsideration and
with the approval of the Mayor, he shall revise the allotments so
as to forestall, so far as possible, the making of commitments and
expenditures in excess of the revenue to be realized during the fiscal
year.