Legislation has been adopted in Northern Ireland to prohibit sexual orientation discrimination (including harassment and victimisation) in the provision of goods, facilities and services; accommodation; education; any functions of a public authority (including social security and healthcare); membership of and participation in private associations with more than 25 members. It enters into force on 1 January 2007.
http://www.opsi.gov.uk/sr/sr2006/20060439.htm

There are exceptions to the prohibition of discrimination. These include an exception for associations of persons of a particular sexual orientation (Reg 17(5)) and the provision of services to persons of a particular sexual orientation (Reg 5(4)). There are also exceptions for religious organisations (Reg 16) and any act done under statutory authority, that is, measures permitted or required by other legislation (Reg 49).

There was a motion brought in the Northern Ireland Assembly calling upon the government to withdraw the Regulations, but this failed (the vote was tied with 39 Assembly members for and 39 against).