Americans with Disabilities Act (ADA) of 1990 (with amendments issued through 2008)

(B) Special rule for single-level passenger coaches for individuals who use wheelchairs

Single-level passenger coaches shall be required to

(i) be able to be entered by an individual who uses a wheelchair;

(ii) have space to park and secure a wheelchair;

(iii) have a seat to which a passenger in a wheelchair can transfer, and a space to fold and store such passenger's wheelchair; and

(iv) have a restroom usable by an individual who uses a wheelchair, only to the extent provided in paragraph (3).