At or before the first meeting of the board of supervisors in September of each year, the commission shall furnish the board of supervisors and the auditor of the county in which the district is situated, an estimate in writing of the amount of money needed for the purposes of the district for the ensuing fiscal year. The amount shall be sufficient to pay:
(a) The interest on all outstanding bonds of the district which will become due during the ensuing fiscal year.
(b) The principal of all outstanding bonds of the district which will mature during the ensuing fiscal year.
(c) The estimated cost of repairs and maintenance of the boulevard, and the running expenses of the district.
(Added by Stats. 1943, Ch. 285.)