Health and Safety Code §363.145

(a) A public agency may declare an emergency if funds are not available to pay the principal of or interest on the public agency's bonds issued under this chapter. (b) The public agency may issue negotiable bond anticipation notes to borrow the money needed in an emergency, and the bond anticipation notes may bear interest at any rate authorized by state law and shall mature within one year of the date of issuance. (c) The bond anticipation notes may be paid with the proceeds of bonds, or bonds may be issued and delivered in exchange for and in substitution of bond anticipation notes.