California Code, Elections Code - ELEC § 14313

(a) Upon the declaration of a state of emergency by the Governor and the issuance of an executive order authorizing an emergency worker to cast a ballot outside of his or her home precinct, elections officials in the counties included in the executive order shall, upon demand, issue to an emergency worker a provisional ballot that may be identical to the provisional ballot offered to other voters in the county, using a process to be determined by the elections official. The elections official shall transmit for processing any ballot cast, including any materials necessary to process the ballot, pursuant to this section to the elections official in the county where the voter is registered to vote.

(b) To be counted, a ballot cast pursuant to this section shall satisfy both of the following requirements:

(c) Upon receipt of the returned ballot, the elections official shall process the ballot pursuant to the procedures in subdivision (c) of Section 14310.

(d) If the requirements in subdivisions (b) and (c) are met and the ballot is eligible to be counted, the ballot shall be duplicated and all other materials preserved according to the procedures set forth in this code.

(e) “Emergency worker” for the purposes of this section means a person who is officially engaged in responding to the proclaimed state of emergency and whose vocation has been identified in an executive order relating to the state of emergency.