The Disability Discrimination Act 1995 (c 50) (informally, and hereafter, the DDA) is an Act of the Parliament of the United Kingdom which has now been repealed and replaced by the Equality Act 2010, except in Northern Ireland where the Act still applies.he DDA 1995 departed from the fundamental principles of older UK discrimination law (the Sex Discrimination Act 1975 and the Race Relations Act 1976).