1068.220—What are the provisions for exempting display engines/equipment?
        
        (b) 
         Nonconforming display engines/equipment will be exempted if they are used only for displays in the interest of a business or the general public. This exemption does not apply to engines/equipment displayed for private use, private collections, or any other purpose we determine is inappropriate for a display exemption.
    
    
        
        (c) 
         You may operate the exempted engine/equipment, but only if we approve specific operation that is part of the display.
    
    
        
        (d) 
         You may sell or lease the exempted engine/equipment only with our advance approval; you may not use it to generate revenue.
    
    
        
        (e) 
         To use this exemption, you must add a permanent label to all engines/equipment exempted under this section, consistent with  § 1068.45, with at least the following items:
    
    
    
    
        
        (3) 
         Engine displacement, family identification, and model year of the engine/equipment (as applicable), or whom to contact for further information.
    
    
    
    
        
        (ii) 
         “THIS EQUIPMENT IS EXEMPT UNDER  40 CFR 1068.220 FROM EMISSION STANDARDS AND RELATED REQUIREMENTS.”