CFR›Title 10›Chapter II›Part 501›Subpart I ContainsSections 501.130–501.134CorpusDaily eCFRDisplayed edition2026-05-08Last updated2026-05-08 Subpart I—Requests for Interpretation Sections 501.130 § 501.130 Purpose and scope. 501.131 § 501.131 Filing a request for interpretation. 501.132 § 501.132 Contents of a request for interpretation. 501.133 § 501.133 DOE evaluation. 501.134 § 501.134 Issuance and effect of interpretations. Previous H Subpart H—Requests for Stay Next J Subpart J—Rulings