46 C.F.R. § 45.135 Hull openings at or below freeboard deck.
Title 46 - Shipping
Closures for hull openings at or below the freeboard deck must be as strong as the structure to which they are attached and must be watertight.
Title 46: Shipping
PART 45—GREAT LAKES LOAD LINES
Subpart D—Conditions of Assignment
§ 45.135 Hull openings at or below freeboard deck.
