CFR›Title 4›Chapter I›Part 28›Subpart B›Subject Group Interlocutory Appeals ContainsSections 28.80–28.81CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Sections 28.80 § 28.80 Explanation. 28.81 § 28.81 Procedures and criteria for certification. Previous Hearings Hearings Next Parties, Practitioners and Witnesses Parties, Practitioners and Witnesses