CA Rev & Tax Code Section 20814

(a)

A participating county shall reduce the amount secured by the lien provided for in subdivision (e) of Section 20811 by the amount of any payment received for that purpose. Payments shall be applied to the oldest deferral amount in order of lien recordation date until paid in full.

(b)

A participating county shall increase the amount secured by that lien to reflect the accrual of interest on the property taxes deferred, or any subsequent deferral of property taxes made with respect to that residential dwelling pursuant to a claim of that claimant.

(c)

A participating county shall annually adjust the lien as described in this section.