Cal. Wat. Code § 35520.35
All bonds issued under this chapter shall be payable in lawful money of the United States. Subject to the provisions of this chapter, the board shall prescribe the form and the manner of execution of the bonds.
An issue of bonds is hereby defined to be all of the bonds to be issued in accordance with a proposal approved by the electors of the district. Each issue of the bonds of a district shall be numbered consecutively, as authorized, and the bonds of each issue shall be numbered consecutively.
The board shall fix the date of the bonds, or may divide any issue into two or more divisions and fix different dates and different rates of interest for the bonds of the divisions. The date of any bond shall be subsequent to the election at which its issuance was authorized. The bonds shall be made payable at such times as the board prescribes, but in no case shall the maturity of any bond be more than 40 years from the date thereof. The bonds shall bear interest at a rate or rates to be fixed by the board, not exceeding 12 percent per annum, payable semiannually on the first day of January and the first day of July of each year. The principal and interest shall be payable at a place to be designated by the board and specified in each bond.
The bonds shall express on their face that they were issued under the authority of this chapter.
Ca. Water Code § 35520.35