On or before the last Friday in July of each year, the board shall file with the board of supervisors and with the county auditor a statement in writing which shall contain the following:
(a) An estimate of the amount of money required to be raised by taxation during the fiscal year for the payment of the principal and interest on any bonded indebtedness of the district.
(b) An estimate of the amount of money required to be raised by taxation during the fiscal year for all other purposes of the district.
The statement shall be predicated upon the budget adopted pursuant to the provisions of Article 5 (commencing with Section 101250) of Chapter 6 of this part.