46 C.F.R. § 111.05-9 Masts.
Title 46 - Shipping
Each nonmetallic mast and topmast must have a lightning ground conductor in accordance with section 10 of IEC 92–401. [CGD 94–108, 62 FR 23907, May 1, 1997] System Grounding
Title 46: Shipping
PART 111—ELECTRIC SYSTEMS—GENERAL REQUIREMENTS
Subpart 111.05—Equipment Ground, Ground Detection, and Grounded Systems
§ 111.05-9 Masts.
