California Code, Elections Code - ELEC § 6914

(a) Each elector nominee and alternate elector nominee of a political party shall execute the following pledge:  “If selected for the position of elector, I agree to serve and to mark my ballots for President and Vice President for the nominees for those offices of the party that nominated me.”

(b) Each elector nominee and alternate elector nominee of an unaffiliated presidential candidate shall execute the following pledge:  “If selected for the position of elector as a nominee of an unaffiliated presidential candidate, I agree to serve and mark my ballots for that candidate and for that candidate's vice presidential running mate.”

(c) The pledges executed pursuant to subdivisions (a) and (b) shall accompany submission of the corresponding names to the Secretary of State.

(d) If, after the nomination of a candidate for President or Vice President by a political party and before the meeting of electors described in Section 6917, the candidate dies or withdraws as a candidate for that office in accordance with the rules of the political party, the pledge described in subdivision (a) applies to the successor candidate for that office nominated by the political party in accordance with the party's rules.

(e) If, after nomination of an unaffiliated candidate for President or Vice President and before the meeting of electors described in Section 6917, the candidate dies or withdraws as a candidate for that office, the pledge described in subdivision (b) applies to the successor candidate for that office nominated by the group of elector nominees of the candidate.