Except where security regulations, rules, orders, or directives apply or a Federal court order or rule prohibits it, persons entering in or on Federal property may take photographs of—
    
    
        
        (a) 
         Space occupied by a tenant agency for non-commercial purposes only with the permission of the occupying agency concerned;
     
    
        
        (b) 
         Space occupied by a tenant agency for commercial purposes only with written permission of an authorized official of the occupying agency concerned; and
     
    
        
        (c) 
         Building entrances, lobbies, foyers, corridors, or auditoriums for news purposes.