Section 9490 Of Article 7. Annual Installments From California Water Code >> Division 5. >> Part 5. >> Chapter 6. >> Article 7.

. The amount necessary to pay the interest and principal, or either, falling due, together with the additional 15 per cent of that amount and the amount for sinking fund purposes, shall constitute the amount to be collected and paid into the bond fund and shall be known as the installment for bonds.