United Kingdom - 2000 Party Finance Law

Part Part II Registration of political parties
Title Section 40: Interpretation of Part II
Section Supplemental
Article

40

(1)In this Part-
"the appointed day" means the day appointed under section 163(2) for the coming into force of section 23;
"financial year", in relation to a registered party, shall be construed in accordance with section 41(6);
"parish or community election" means an election of councillors for a parish in England or a community in Wales;
"party" includes any organisation or person;
"the register" shall be construed in accordance with section 28(10);
"registered" (unless the context otherwise requires) means registered under this Part (whether in the Great Britain or the Northern Ireland register), and other references to registration shall be construed accordingly;
"the registrar of companies" means the registrar or other officer who performs the duty of registering companies under the [1985 c. 6.] Companies Act 1985;
"relevant election" shall be construed in accordance with section 22(5).
(2)For the purposes of this Part a registered party contests an election-
(a)by one or more candidates standing for election in the party's name at the election, or
(b)by the party itself standing nominated at the election.

Categories - Extra-parliamentary party (Registration reqs.)
Source http://legislation.data.gov.uk/ukpga/2000/41/enacted/data.htm?wrap=true