“An Act to establish a clear and comprehensive prohibition of discrimination on the basis of disability.” PDD is used in employee selection and loss investigation in both the public and private sector, and some provisions of the ADA limit the types of inquiries that can be included in the test coverage. Some of the lines of questioning historically taken during pre-employment screening may not be in compliance with ADA rules (e.g. historic alcohol or drug use). Provisions of the Act can be found at the Department of Labor Web site: www.dol.gov/.