A carrier may not impose any terms restricting refunds of the ticket price, imposing monetary penalties on passengers, or raising the ticket price consistent with Sec. 399.87 of the chapter, unless the passenger receives conspicuous written notice of the salient features of those terms on or with the ticket. [Doc. No. DOT-OST-2010-0140, 76 FR 23163, Apr. 25, 2011]