California Code, Elections Code - ELEC § 6918

(a) After the vote of this state's electors is completed, if the final list of electors differs from any list that the Governor previously included on a certificate of ascertainment prepared and transmitted under Section 5 of Title 3 of the United States Code, the Secretary of State immediately shall prepare an amended certificate of ascertainment and transmit it to the Governor for the Governor's signature.

(b) The Governor immediately shall deliver the signed amended certificate of ascertainment to the Secretary of State and a signed duplicate original of the amended certificate of ascertainment to all individuals entitled to receive this state's certificate of ascertainment, indicating that the amended certificate of ascertainment is to be substituted for the certificate of ascertainment previously submitted.

(c) The Secretary of State shall prepare a certificate of vote. The electors on the final list shall sign the certificate. The Secretary of State shall process and transmit the signed certificate with the amended certificate of ascertainment under Sections 9 to 11, inclusive, of Title 3 of the United States Code.