CFR›Title 18›Chapter I›Part 154›Subpart E ContainsSections 154.400–154.403CorpusDaily eCFRDisplayed edition2026-04-24Last updated2026-04-24 Subpart E—Limited Rate Changes Sections 154.400 § 154.400 Additional requirements. 154.401 § 154.401 RD&D expenditures. 154.402 § 154.402 ACA expenditures. 154.403 § 154.403 Periodic rate adjustments. Previous D Subpart D—Material To Be Filed With Changes Next F Subpart F—Refunds and Reports