(1)A person entitled to vote as an elector at a parliamentary election in any constituency is one who—
(a)is resident there on the qualifying date (subject to subsection (2) below in relation to Northern Ireland); and
(b)on that date and on the date of the poll—
(i)is not subject to any legal incapacity to vote (age apart); and
(ii)is either a Commonwealth citizen or a citizen of the Republic of Ireland; and
(c)is of voting age (that is, 18 years or over) on the date of the poll.
(2)A person is not entitled to vote as an elector at a parliamentary election in any constituency in Northern Ireland unless he was resident in Northern Ireland during the whole of the period of three months ending on the qualifying date for that election.
(3)A person is not entitled to vote as an elector in any constituency unless registered there in the register of parliamentary electors to be used at the election.
(4)A person is not entitled to vote as an elector—
(a)more than once in the same constituency at any parliamentary election;
(b)in more than one constituency at a general election.