The Office of Vehicle Safety Compliance, investigates compliance with Federal motor vehicle safety standards and associated regulations, and to this end may:
    
    
        
        (a) 
         Verify that manufacturers certify compliance with all applicable safety standards;
     
    
        
        (b) 
         Collect field reports from all sources;
     
    
        
        (c) 
         Inspect manufacturers' certification test data and other supporting evidence, including dealer communications;
     
    
        
        (d) 
         Inspect vehicles and equipment already in use or new vehicles and equipment at any stage of the manufacturing, distribution and sales chain;
     
    
        
        (e) 
         Conduct selective compliance tests; and
     
    
        
        (f) 
         Utilize other means necessary to conduct investigations.