The definitions in subpart A of this part apply to this subpart. The following definitions also apply to this subpart:
    
    
        
            Exemption means exemption from the prohibitions of  § 90.1003.
     
    
        
            Export exemption means an exemption granted under  § 90.1004(b) for the purpose of exporting new nonroad engines.
     
    
        
            National security exemption means an exemption granted under  § 90.1004(b) for the purpose of national security.
     
    
        
            Manufacturer-owned nonroad engine means an uncertified nonroad engine  owned and controlled by a nonroad engine manufacturer and used in a manner not involving lease or sale by itself or in a vehicle employed from year to year in the ordinary course of business for product development, production method assessment, and market promotion purposes.
    
    
        
            Testing exemption means an exemption granted under  § 90.1004(b) for the purpose of research, investigations, studies, demonstrations or training, but not including national security.