301-50.5—What is my liability if I do not use my agency's TMS or the E-Gov Travel Service, and an exception has not been approved?
If you do not have an approved exception under § 301-50.4 or § 301-73.104 of this chapter, you are responsible for any additional costs resulting from the failure to use the TMS or E-Gov Travel Service, including service fees, cancellation penalties, or other additional costs (e.g., higher airfares, rental car charges, or hotel rates). In addition, your agency may take appropriate disciplinary action.