California Code, Vehicle Code - VEH § 27158.1

(a) Commencing one year after the effective date of a regulation implementing the Heavy-Duty Vehicle Inspection and Maintenance Program (Chapter 5.5 (commencing with Section 44150) of Part 5 of Division 26 of the Health and Safety Code), a legal owner or registered owner of a nongasoline heavy-duty onroad motor vehicle with a gross vehicle weight rating of more than 14,000 pounds shall maintain a Heavy-Duty Vehicle Inspection and Maintenance Compliance Certificate, as described in Section 44152 of the Health and Safety Code, or a facsimile or electronic copy of that certificate of compliance, with the vehicle for which the certificate is issued.

(b) Subdivision (a) does not apply when a Heavy-Duty Vehicle Inspection and Maintenance Compliance Certificate is necessarily removed from the vehicle for the purpose of renewal or when the vehicle is left unattended.

(c) A violation of this section shall be cited in accordance with Section 40610.