28 CFR Part 36 Nondiscrimination on the Basis of Disability by Public Accommodations and in Commercial Facilities NPRM (2008 Title III NPRM)

(b) Other power-driven mobility devices.  A public accommodation shall make reasonable modifications in its policies, practices, and procedures to permit the use of other power-driven mobility devices by individuals with disabilities, unless the public accommodation can demonstrate that the use of the device is not reasonable or that its use will result in a fundamental alteration in the nature of the public accommodation's goods, services, facilities, privileges, advantages, or accommodations.