Section R. 281.3113 - Vessel passenger capacity; determinationRule 113.
(1) On vessels that do not have or are not required to have a vessel capacity plate, the maximum passenger capacity shall be determined by applying any 1 of the following criteria which results in the allowance of the greatest number of passengers.(a) One passenger per 30 inches of rail space available to passengers at the vessel's sides and across the transom.(b) One passenger per 10 square feet of deck area available for passenger use. In computing the deck area, the areas occupied by concession stands, toilets and washrooms, companionways, and stairways shall be excluded.(c) One passenger per 18 inches of width of fixed seating provided.(2) On vessels that have or are required to have vessel capacity plates, the passenger capacity shall be determined by applying either of the following criteria which results in the allowance of the greatest number of persons without exceeding the capacity plate maximums: (a) Weight capacity minus maximum motor and gear weight: 185= number of passengers.(b) Boat length times boat beam : 15 = number of passengers.Mich. Admin. Code R. 281.3113