46 C.F.R. § 111.05-9
Masts
Each nonmetallic mast and topmast must have a lightning-ground conductor in accordance with section 10 of IEC 60092-401:1980 (incorporated by reference; see § 110.10-1 of this subchapter).
Each nonmetallic mast and topmast must have a lightning-ground conductor in accordance with section 10 of IEC 60092-401:1980 (incorporated by reference; see § 110.10-1 of this subchapter).