Legislation and Regulation Disability Discrimination Act (DDA) (1995) The DDA defines a persons disability as a physical or mental impairment which has substantial and long- term adverse effect on his or her ability to carry out normal day-to-day activities To avoid discrimination under the terms of the DDA, you must not treat a disabled person less favourably than someone else, because of the persons disability, unless there is good reason to do so.
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