California Code, Streets and Highways Code - SHC § 5895.1

If bonds are to be issued to represent the security of the unpaid assessments, upon confirmation of the report by the legislative body the superintendent of streets shall give notice to pay by mail and by publication substantially in the manner provided by Sections 4320 and 4321. The period for payment in cash stated therein shall be 30 days following the confirmation of the report. Upon completion of such cash payment period, the superintendent of streets shall file with the county recorder a certificate substantially in the form set out in Section 5891, giving notice therein that interest is payable at a rate to be fixed upon the sale of bonds, which rate shall not exceed 7 percent per annum. Thereafter the provisions of Part 5 of this division shall be applicable and payments on assessments at bond shall be made as therein provided. Such bonds may be issued and sold as the legislative body directs and may be dated at any time after the expiration of the cash payment period.