CFR›Title 14›Chapter II›14 CFR Part 204 Citation14 CFR Part 204ContainsSubparts Subpart A–Subpart BCorpusDaily eCFRDisplayed edition2026-10-01Last updated2026-10-01 PART 204—DATA TO SUPPORT FITNESS DETERMINATIONS Subparts Subpart A Subpart A—General Provisions Subpart B Subpart B—Filing Requirements Authority49 U.S.C. Chapters 401, 411, 417.SourceDocket No. 47582, 57 FR 38766, Aug. 27, 1992, unless otherwise noted.