California Code, Revenue and Taxation Code - RTC § 12208

(a) There shall be allowed as a credit against the amount of tax, as defined in Section 28 of Article XIII of the California Constitution, an amount equal to the amount of the gross premiums tax due from the insurer on account of pilot project insurance for previously uninsured motorists.

(b) As used in this section “pilot project insurance for previously uninsured motorists” means motor vehicle liability insurance issued by an insurer under Article 5.5 (commencing with Section 11629.7) or Article 5.6 (commencing with Section 11629.9) of Chapter 1 of Part 3 of Division 2 of the Insurance Code, with respect to an insured who, at the time of the issuance, owned or operated a motor vehicle without proof of financial responsibility as defined in Section 16020 of the Vehicle Code, and any renewal of that insurance.