CFR›Title 40›Chapter I›Part 797 ContainsSubparts A–BCorpusDaily eCFRDisplayed edition2026-04-27Last updated2026-04-27 PART 797—ENVIRONMENTAL EFFECTS TESTING GUIDELINES Subparts A Subpart A [Reserved] B Subpart B—Aquatic Guidelines Sections 797.1050–797.1950 Authority15 U.S.C. 2603.Source50 FR 39321, Sept. 27, 1985, unless otherwise noted. Previous 796 Part 796—Chemical Fate Testing Guidelines Next 798 Part 798—Health Effects Testing Guidelines