The tax shall be levied and collected at the same time and in the same manner as the general tax levy for county purposes, and the revenue derived from the tax shall be paid into the county treasury to the credit of the operating fund of the district, unless the board has designated a depository or depositories pursuant to Section 4730.5 or Section 4730.7 in which case the revenue shall be paid into the depository or depositories, as directed by the board, and the district board shall control and order its expenditure.