California Code, Elections Code - ELEC § 105

(a)(1) For purposes of verifying a signature on an initiative, referendum, recall, nomination, or other election petition or paper, the elections official shall determine that the residence address on the petition or paper is the same as the residence address on the affidavit of registration. If the addresses are different, or if the petition or paper does not specify the residence address, or, in the case of an initiative or referendum petition, the information specified in Section 9020 is not contained in the petition, the affected signature shall not be counted as valid.

(2) Notwithstanding paragraph (1), the elections official shall not invalidate a signature for an incomplete or inaccurate apartment or unit number in the signer's residence address.