CFR › Title 46 › Part 111 › §111.59-146 CFR §111.59-1Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkEach busway must meet Article 368 of NFPA 70 or IEC 61439-6:2012 (incorporated by reference; see § 110.10-1 of this subchapter).