Yes, you may not acquire—
    
    
        
        (a) 
         More aircraft than you need to carry out your official business;
     
    
        
        (b) 
         Aircraft of greater size or capacity than you need to perform your Governmental functions cost-effectively; or
     
    
        
        (c) 
         Federal aircraft that Congress has not authorized your agency to acquire or Federal aircraft or commercial aircraft and services for which you have not followed the requirements in OMB Circular A-76.