28 CFR Part 35 Title II Notice of Proposed Rulemaking (NPRM) (published 2008)

(B) In choosing which accessible elements to provide, priority should be given to those elements that will provide the greatest access, in the following order:

(1) An accessible entrance;

(2) An accessible route to the altered area;

(3) At least one accessible restroom for each sex or a single unisex restroom;

(4) Accessible telephones;

(5) Accessible drinking fountains; and

(6) When possible, additional accessible elements such as parking, storage, and alarms.