28 CFR Part 35 Nondiscrimination on the Basis of Disability in State and Local Government Services (2010 ADA Title II Regulations with amendments issued through Aug. 2016)

(c)

(1) Inquiry about disability. A public entity shall not ask an individual using a wheelchair or other power-driven mobility device questions about the nature and extent of the individual's disability.

(2) Inquiry into use of other power-driven mobility device. A public entity may ask a person using an other power-driven mobility device to provide a credible assurance that the mobility device is required because of the person's disability. A public entity that permits the use of an other power-driven mobility device by an individual with a mobility disability shall accept the presentation of a valid, State-issued, disability parking placard or card, or other State-issued proof of disability as a credible assurance that the use of the other power-driven mobility device is for the individual's mobility disability. In lieu of a valid, State-issued disability parking placard or card, or State-issued proof of disability, a public entity shall accept as a credible assurance a verbal representation, not contradicted by observable fact, that the other power-driven mobility device is being used for a mobility disability. A “valid” disability placard or card is one that is presented by the individual to whom it was issued and is otherwise in compliance with the State of issuance’s requirements for disability placards or cards.