Cal. Veh. Code § 17705

If the person who is required to sign and verify the application of a minor gives his or her written consent, or the minor is emancipated other than by marriage, the department may accept an application signed and verified only by the minor and accompanied by proof of financial responsibility, as defined in Section 16430. The person giving the consent to but not signing or verifying the application shall not be subject to the civil liability specified in Sections 17707 and 17708 merely by reason of having given consent.