(a) If funds are not available to pay the principal of or interest on bonds issued by the district or to pay other obligations of the district, the board may declare an emergency and may issue negotiable bond anticipation notes to borrow the money needed. The bond anticipation notes may bear interest at a rate that does not exceed the maximum rate provided by Chapter 1204, Government Code, and must mature within one year after their date of issuance.
(b) Bond anticipation notes may also be issued for any purpose for which bonds of the district have been voted or to refund previously issued bond anticipation notes.

(c) Bond anticipation notes issued under this section must be authorized by resolution of the board, subject to approval by the commissioners court under § 324.045, and must be executed by the president of the board and attested by the secretary of the board.