CFR›Title 21›Chapter I›Part 251 ContainsSubparts A–CCorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 PART 251—SECTION 804 IMPORTATION PROGRAM Subparts A Subpart A—General Provisions Sections 251.1–251.2 B Subpart B—Section 804 Importation Program Proposals and Pre-Import Requests Sections 251.3–251.8 C Subpart C—Certain Requirements for Section 804 Importation Programs Sections 251.9–251.21 Authority21 U.S.C. 351, 352, 353, 355, 360, 360eee-1, 371, 374, 381, 384.Source85 FR 62126, Oct. 1, 2020, unless otherwise noted. Previous 250 Part 250—Special Requirements for Specific Human Drugs Next 290 Part 290—Controlled Drugs