91.325—Primary category aircraft: Operating limitations.
        
        (a) 
         No person may operate a primary category aircraft carrying persons or property for compensation or hire.
    
    
        
        (b) 
         No person may operate a primary category aircraft that is maintained by the pilot-owner under an approved special inspection and maintenance program except—
    
    
    
        
        (2) 
         A designee of the pilot-owner, provided that the pilot-owner does not receive compensation for the use of the aircraft.