Cal. Veh. Code § 22513
(a)
(2)
(A) A towing company or the owner or operator of a tow truck summoned, or alleging it was summoned, to the scene by the owner or operator of a disabled vehicle shall possess all of the following information in writing prior to arriving at the scene:
(B) A towing company or the owner or operator of a tow truck summoned, or alleging it was summoned, to the scene by a motor club, as defined by Section 12142 of the Insurance Code, pursuant to the request of the owner or operator of a disabled vehicle is exempt from the requirements of subparagraph (A), provided it possesses all of the following information in writing prior to arriving at the scene:
(3) A towing company or the owner or operator of a tow truck requested, or alleging it was requested, to stop at the scene by the owner or operator of a disabled vehicle shall possess all of the following information in writing upon arriving at the scene:
(4) A towing company or the owner or operator of a tow truck summoned or requested, or alleging it was summoned or requested, by a law enforcement officer or public agency pursuant to that agency’s procedures to stop at the scene of an accident or near a disabled vehicle for the purpose of soliciting an engagement for towing services, either directly or indirectly, to furnish towing services, or that is expressly authorized to move a vehicle from a highway, street, or public property when the vehicle has been left unattended or when there is an injury as the result of an accident, shall possess all of the following in writing before leaving the scene:
(c)
(1) Prior to attaching a vehicle to the tow truck, if the vehicle owner or operator is present at the time and location of the anticipated tow, the towing company or the owner or operator of the tow truck shall furnish the vehicle’s owner or operator with a written itemized estimate of all charges and services to be performed. The estimate shall include all of the following:
(d)
(1) Except as provided in paragraph (2), a towing company or the owner or operator of a tow truck shall not charge a fee for towing or storage, or both, of a vehicle in excess of the greater of the following:
(f) This section shall not apply to the following: