The board may defray any costs of the service authority by the issuance of notes or warrants to evidence the amount due therefor, in anticipation of taxes or revenues or both. Interest on such notes or warrants shall be governed by the provisions of section 5-12-104, C.R.S. Notes and warrants may mature at such time not exceeding one year from their date of issuance as the board may determine. If such notes or warrants are not paid during the fiscal year in which they are issued, the board shall, at the end of its fiscal year, budget the amount necessary to pay in full the amount of notes and warrants outstanding and due during the next fiscal year.