CFR›Title 49›Subtitle A›Part 1›Subpart B ContainsSections 1.11–1.17; Subject group OST OfficialsCorpusDaily eCFRDisplayed edition2026-05-15Last updated2026-05-15 Subpart B—Office of the Secretary Contents 1.11 § 1.11 Overview. 1.13 § 1.13 OST key responsibilities. 1.15 § 1.15 OST structure. 1.17 § 1.17 OST line of secretarial succession. OST Officials OST Officials Sections 1.20–1.60 Previous Appendix A to Part 1 Appendix A to Part 1—Delegations and Redelegations by Secretarial Officers Next C Subpart C—Office of Inspector General