46 C.F.R. § 173.060 Openings in the side of a vessel below the bulkhead or weather deck.
Title 46 - Shipping
(a) Openings in the side of a vessel below the bulkhead or weather deck must comply with the requirements in subpart F of part 171 of this subchapter or §179.350 in subchapter T of this chapter. (b) In addition to the requirements in paragraph (a) of this section, each sailing school vessel which has a mean length greater than 90 feet must comply with the requirements in §56.50–95 of Subchapter F of this chapter. [CGD 83–005, 51 FR 924, Jan. 9, 1986, as amended by CGD 85–080, 61 FR 945, Jan. 10, 1996]
Title 46: Shipping
PART 173—SPECIAL RULES PERTAINING TO VESSEL USE
Subpart C—School Ships
§ 173.060 Openings in the side of a vessel below the bulkhead or weather deck.

