New 1983 through 1997 model-year passenger cars, light-duty trucks, and medium-duty vehicles, excluding zero-emission vehicles and medium-duty vehicles certified according to the optional standards and test procedures of section 1956.8, Title 13, California Code of Regulations, subject to certification and manufactured for sale in California shall be tested in accordance with the “California Assembly-Line Test Procedures for 1983 Through 1997 Model-Year Passenger Cars, Light-Duty Trucks and Medium-Duty Vehicles,” adopted November 24, 1981, as last amended June 24, 1996, which is incorporated herein by reference, including federally certified light-duty motor vehicles, except as provided in “Guidelines for Certification of 1983 and Subsequent Model-Year Federally Certified Light-Duty Motor Vehicles for Sale in California,” adopted July 20, 1982, as last amended July 12, 1991, which is incorporated herein by reference. For vehicles certified to NMOG standards, any reference to NMHC standards in “California Assembly-Line Test Procedures for 1983 Through 1997 Model-Year Passenger Cars, Light-Duty Trucks and Medium-Duty Vehicles” shall imply NMOG standards.