To limit the probability that a person using a manual wheelchair or other manual mobility assistance device will not be able to use a lavatory in a barrier-free washroom without the assistance of another person.
[Subclause (c)(i)] To exempt lavatories from the requirement for a greater minimum width as stated in Sentence 3.8.1.3.(1) and permit a lesser minimum width, on the basis that lavatories need not be wider to allow proper usage by persons using manual wheelchairs or other manual mobility assistance devices.