CFR›Title 14›Chapter II›Part 399›14 CFR Part 399 Subpart H Citation14 CFR Part 399 Subpart HContainsSection § 399.91CorpusDaily eCFRDisplayed edition2026-08-05Last updated2026-08-05 Subpart H—Other Policies Relating to Interests, Activities, and Relationships of Air Carriers Sections § 399.91 § 399.91 Air carrier participation in programs of technical assistance to airlines of less developed countries. Authority49 U.S.C. 41712, 40113(a).SourcePS-21, 29 FR 1446, Jan. 29, 1964, unless otherwise noted.