CFR › Title 46 › Part 113 › §113.65-546 CFR §113.65-5Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkEach whistle operator must meet Section 18 of IEEE 45.1-2017 (incorporated by reference; see § 110.10-1 of this subchapter).