(a) As a carrier, you must ensure that all new single-aisle aircraft that you operate with an FAA-certificated maximum seating capacity of 125 seats or more in which lavatories are provided, shall include at least one lavatory of sufficient size to:

(1) Permit a qualified individual with a disability equivalent in size to a 95th percentile male to approach, enter, maneuver within as necessary to use all lavatory facilities, and leave, by means of the aircraft's on-board wheelchair, in a closed space that affords privacy equivalent to that afforded to ambulatory users; and

(2) Permit an assistant equivalent in size to a 95th percentile male to assist a qualified individual with a disability, including assisting in transfers between the toilet and the aircraft's on-board wheelchair, within a closed space that affords privacy equivalent to that afforded to ambulatory users.

(b) You are not required to retrofit cabin interiors of existing single-aisle aircraft to comply with the requirements of paragraph (a) of this section.

(c) As a carrier, you must comply with the requirements of this section with respect to new aircraft that you operate that were originally ordered after October 3, 2033, or delivered after October 2, 2035, or are part of a new type-certificated design filed with the FAA or a foreign carrier's safety authority after October 2, 2024.