CFR /  Title 46  /  Part 113  /  Sec. 113.65-5 General requirements.

Each whistle operator must meet section 21.5 of IEEE Std 45-2002 (incorporated by reference; see 46 CFR 110.10-1). [USCG-2003-16630, 73 FR 65202, Oct. 31, 2008]

SUBCHAPTER K_SMALL PASSENGER VESSELS CARRYING MORE THAN 150 PASSENGERS

OR WITH OVERNIGHT ACCOMMODATIONS FOR MORE THAN 49 PASSENGERS