It depends. The Disability Discrimination Act (1995) states that
Quote:
a person has a disability for the purposes of this Act if he has a physical or mental impairment which has a substantial and long-term adverse effect on his ability to carry out normal day-to-day activities.
So, if you meet that requirement, then you are covered by the act.
It's worth pointing out that a lot of the act has been superseded by the
Equality Act (2010), which mentions Autism directly as a disability:
Link to Equality Act
Also, if you live in England you are covered by the Autism Act 2009. If you live in Wales, the relevant legislation is the Autistic Spectrum Disorder (ASD) Strategic Action Plan for Wales. In Northern Ireland it's the Autism Act 2011. MSPs in Scotland voted against a Scottish Autism Bill, so there is no similar legislation in Scotland.