All revenues payable to the state and deposited in a separate account in the fund pursuant to Section 19606.1 that are allocated by the Secretary of Food and Agriculture for the purposes of paragraph (1) of subdivision (a) of Section 19606.1 are hereby pledged for the repayment of the principal of, and interest on, bonds issued by a joint powers agency, or of other debt service or expense incurred for the purposes described in that paragraph (1).