122.61—Aircraft required to clear.
        
        (a) 
         Private aircraft leaving the United States as defined in  § 122.22, for a foreign area are required to clear as set forth in  § 122.26. All other aircraft, except for public aircraft leaving the United States for a foreign area, are required to clear if:
    
    
    
    
        
        (b) 
         Any aircraft used by members of air travel clubs are required to clear, and foreign aircraft traveling under a permit to proceed shall also clear.