173.81—Coast Guard forms for numbering and casualty reporting.
        
        (a) 
         In a State where the Coast Guard is the issuing authority, the following Coast Guard forms must be used:
    
    
        
        (1) 
         Each application for a certificate of number or renewal must be made on two-part Form CG-3876 and 3876A, Application for Number and Temporary Certificate.
    
    
        
        (2) 
         Each notification required by  § 173.29(b) must be made on Form CG- 2921, Notification of Change in Status of Vessel.
    
    
        
        (3) 
         Each notification required by  § 173.29(a) must be made on Form CG- 3920, Change of Address Notice.
    
    
    
        
        (5) 
         Each application for a duplicate certificate of number must be made on two-part Form CG-3919 and CG-3919A, Application for Duplicate Certificate of Number and Temporary Duplicate Certificate.
    
    
    
        
        (b) 
         Each surrender of a certificate of number required by  § 173.31 may be made in any form but must contain a written statement as to why the certificate is being surrendered.