California Code, Public Utilities Code - PUC § 40241

The bonds shall be issued in such denominations as the board determines, except that no bonds shall be issued of a denomination less than one thousand dollars ($1,000) and shall be payable on the day and at the place or places fixed in the bond, and with interest at the rate specified therein, payable semiannually, except that interest for the first year after the date of the bonds may be made payable at the end of that year.