CFR›Title 9›Chapter I›Part 2›Subpart B ContainsSections 2.25–2.27CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Subpart B—Registration Sections 2.25 § 2.25 Requirements and procedures. 2.26 § 2.26 Acknowledgment of regulations and standards. 2.27 § 2.27 Notification of change of operation. Previous A Subpart A—Licensing Next C Subpart C—Research Facilities