301-10.108—What requirements must be met to use a non-contract fare?
        
        (a) 
         Before purchasing a non-contract fare you must meet one of the exception requirements listed in  § 301-10.107 and show approval on your travel authorization to use a non-contract fare; and
    
    
        
        (b) 
         If the non-contract fare is non-refundable, restricted, or has specific eligibility requirements, you must know or reasonably anticipate, based on your planned trip, that you will use the ticket; and
    
    
        
        (c) 
         Your agency must determine that the proposed non-contract transportation is practical and cost effective for the Government.