This regulation does not apply to a: Class K (farm area) vehicle as defined in Transportation Article, §13-935, Annotated Code of Maryland; Construction vehicle working within the confines of a public works construction work project site as outlined in the construction project's plans and specifications, provided the distance travelled does not exceed 1 mile or the distance specified in an extension granted by the Maryland Department of Transportation; Construction vehicle or mining equipment while crossing a highway between construction or mining sites; or Vehicle, within the Port of Baltimore for a distance not to exceed 1 mile, carrying a load of loose material between a stockpile or storage facility and a vessel docked at the Port. This regulation applies to: Any vehicle, not otherwise exempted, manufactured on or before July 1, 1990 and carrying loose material if any part of the loose material is within 6 inches of the top of any bed enclosure it touches; Any vehicle, not otherwise exempted, manufactured after July 1, 1990 regardless of the loading of loose material; After January 1, 1992, any vehicle not otherwise exempted and regardless of loading of loose material. The requirements of this regulation apply only to the issuance and certification of a safety equipment repair order and do not apply to a complete inspection required upon sale or transfer of ownership of a used vehicle. A safety equipment repair order may be certified only if the cover is present, fully covers the top of the bed, and meets the requirements of this regulation.