41 CFR § 304-3.9
May I use other than coach-class accommodation on common carriers or other than lowest first-class accommodations on ships when a non-Federal source pays in full for my transportation expenses to attend a meeting?
June 9, 2020
Yes, you may use other than coach-class accommodation on common carriers if you meet one of the criteria contained in §301-10.123 or §301-10.162 or you may use other than lowest first-class travel if you meet one of the criteria contained in §301-10.183 of this Title, and are authorized to do so by your agency in accordance with §304-5.5 of this chapter.
[FTR Amdt. 2009-06, 74 FR 55151, Oct. 27, 2009]