46 C.F.R. § 72.25-15 Passenger accommodations for excursion boats, ferryboats, and passenger barges.
Title 46 - Shipping
(a) Except as specifically excluded by this section, separate public toilet spaces shall be provided for male and female passengers with at least the minimum equipment in each based upon the number of passengers permitted to be carried as set forth in table 72.25–15(a). (b) In the men's spaces, urinals may be substituted for toilets, provided at least one-half the required toilets are fitted. (c) On ferryboats and barges having a short run, passenger toilet facilities need not be fitted.
Title 46: Shipping
PART 72—CONSTRUCTION AND ARRANGEMENT
Subpart 72.25—Passenger Accommodations
§ 72.25-15 Passenger accommodations for excursion boats, ferryboats, and passenger barges.
Table 72.25-15(a)------------------------------------------------------------------------ Number of passengers-------------------------------------------------- Toilets Washbasins Over Not over------------------------------------------------------------------------ 100 1 1100................................... 300 2 1300................................... 500 3 2500................................... 1,000 4 21,000................................. 1,500 5 31,500................................. 2,000 6 32,000................................. 2,500 7 42,500................................. 3,000 8 43,000................................. 3,500 9 53,500................................. 4,000 10 54,000................................. ......... (\1\) (\1\)------------------------------------------------------------------------\1\ Additional facilities by extrapolation.

