California Code, Streets and Highways Code - SHC § 6467.3

The certificate shall be payable at the office of the treasurer of the city conducting the proceedings upon presentation of the principal and interest coupons.  At least 30 days prior to the first day of July of each and every year after the date of the certificate, until the certificate is paid in full, the treasurer shall mail postage prepaid to the entity whose obligation it is to levy a tax to pay the amount of principal and interest falling due each year, a notice of the amount due in the next succeeding fiscal year, the date when payments are due upon the certificates, and that payment shall be made to the city conducting the proceedings by the entity obligated to levy the tax to make the payments due thereon at least 30 days prior to the due date of any installment of principal or interest upon said certificate.  Failure of the treasurer to notify the entity obligated to make payment shall not affect the obligation of the entity, whose duty it is to make such payment, to make payment thereof as required by Section 5302.5 of this code.

In the event the public entity owning the property against which the assessment has been levied, and which is represented by the certificates authorized in this chapter, shall sell the said property prior to the maturity and payment in full of all of the certificates representing such assessment, then all of the outstanding certificates shall be immediately payable in full together with the accrued interest thereon not later than sixty (60) days from the date of sale without premium.  Interest shall be payable to the date of designated payment and the owner of the certificates, as the owner appears upon the records of the treasurer, shall be given written notice of such payment at his last known address or, if not known, at general delivery.  Interest upon said certificates shall cease and terminate at the date designated for payment thereof in full, provided funds for the payment of all such principal and interest to such date have been paid into the proper redemption fund therefor and are available for such payment.