CFR›Title 45›Subtitle A›Part 81›45 CFR Part 81 Subpart D Citation45 CFR Part 81 Subpart DContainsSections § 81.31–§ 81.36CorpusDaily eCFRDisplayed edition2026-10-21Last updated2026-10-21 Subpart D—Form, Execution, Service and Filing of Documents Sections § 81.31 § 81.31 Form of documents to be filed. § 81.32 § 81.32 Signature of documents. § 81.33 § 81.33 Filing and service. § 81.34 § 81.34 Service—how made. § 81.35 § 81.35 Date of service. § 81.36 § 81.36 Certificate of service. Authority5 U.S.C. 301 and 45 CFR 80.9(d).Source32 FR 15156, Nov. 2, 1967, unless otherwise noted.