(a) Testing to determine compliance with the requirements of this division (relating to Automotive Windshield Washer Fluid) shall be performed using methods which are shown to accurately determine the concentration of volatile organic compounds (VOCs) in a subject product or its emissions.(b) Testing to determine compliance with the requirements of this division may alternatively be demonstrated through calculation of the VOC content from records of amounts of constituents used to manufacture the product. Compliance determination based on these records may not be used unless the manufacturer of automotive windshield washer fluid keeps accurate and updated records of production of the amount and chemical composition of the individual product constituents. These records must be kept for at least three years.