California Code, Health and Safety Code - HSC § 19892

(a) On or after July 1, 2019, no person, corporation, or entity shall manufacture for sale in this state, sell, offer for sale at retail or wholesale, or install in this state a residential automatic garage door opener that does not have a battery backup function that is designed to operate when activated because of an electrical outage. The battery backup function shall operate in a manner so that the automatic garage door opener is operational without interruption during an electrical outage.

(b) This section applies to all automatic garage door openers manufactured and sold for use in any residence and other residential applications of automatic garage door openers manufactured for commercial purposes.

(c) On or after July 1, 2019, no replacement residential garage door shall be installed in a manner that connects the replacement door to an existing residential automatic garage door opener that does not meet the requirements set forth in subdivision (a), regardless of the date of manufacture of the residential automatic garage door opener.