California Code, Health and Safety Code - HSC § 44013.5

(a) If the department, in consultation with the state board, determines that substantial demand for emission retrofit devices exists, the department shall develop a program for the certification of emissions retrofit device installations by licensed installers. The department may require installers of emissions retrofit devices to be qualified pursuant to this chapter. The department may assess biennial license fees upon those installers in an amount not to exceed the reasonable cost of administering the emissions retrofit device certification program.

(b) The certification shall be performed at a referee or test-only station and shall be based on a visual inspection of the emissions retrofit device and its installation, and verification of the proper operation of any new or modified components that are a part of the emissions retrofit device, and not on the results of an emissions test.

(c) The department shall develop a program for the identification of retrofitted vehicles at smog check stations and for providing information required for the inspection of those systems to smog check stations.

(d) This section shall become inoperative pursuant to Section 33 of the act adding this section or, in any case, five years from the date determined pursuant to Section 32 of the act adding this section, and on the January 1 following the date upon which this section becomes inoperative, is repealed.