Section 43644 Of Article 1. Device Certification From California Health And Safety Code >> Division 26. >> Part 5. >> Chapter 3. >> Article 1.

. (a) No person shall install, sell, offer for sale, or advertise, or, except in an application to the state board for certification of a device, represent, any device as a motor vehicle pollution control device for use on any used motor vehicle unless that device has been certified by the state board. No person shall sell, offer for sale, advertise, or represent any motor vehicle pollution control device as a certified device which, in fact, is not a certified device. Any violation of this subdivision is a misdemeanor.
  (b) Subdivision (a) shall not preclude any person from installing, selling, offering for sale, or advertising a device as a motor vehicle pollution control device for use on a particular classification of used motor vehicles if the state board has found that the installation of the device on that particular classification of used motor vehicle results in such vehicles meeting the state exhaust emissions standards.