The federal government has issued several opinion letters on the ADA in response to direct inquiries since 1992.
These letters are to be considered informal guidance only.

General

Mr. XX has concerns about questions that the ADA may not permit an employer to ask in pre-employment interviews.

Executive agencies

Requirements for Executive agencies are substantially the same as the requirements for private employers under the ADA.

State & local government employment

You inquire what obligations state governments have with respect to nondiscrimination in employment under the ADA.

This letter responds to your recent inquiries requesting clarification of the employment requirements of title II of the Americans with Disabilities Act (ADA).