Cal. Penal Code - PEN § 26100. Section 26100.
(a)
It is a misdemeanor for a driver of any motor vehicle or the owner of any motor vehicle, whether or not the owner of the vehicle is occupying the vehicle, knowingly to permit any other person to carry into or bring into the vehicle a firearm in violation of Section 25850 of this code or Section 2006 of the Fish and Game Code.
(b)
Any driver or owner of any vehicle, whether or not the owner of the vehicle is occupying the vehicle, who knowingly permits any other person to discharge any firearm from the vehicle is punishable by imprisonment in the county jail for not more than one year or in state prison for 16 months or two or three years.
(c)
Any person who willfully and maliciously discharges a firearm from a motor vehicle at another person other than an occupant of a motor vehicle is guilty of a felony punishable by imprisonment in state prison for three, five, or seven years.
(d)
Except as provided in Section 3002 of the Fish and Game Code, any person who willfully and maliciously discharges a firearm from a motor vehicle is guilty of a public offense punishable by imprisonment in the county jail for not more than one year or in the state prison.