(1) On the day appointed for the polling to take place for the general election, a referendum of electors must be held on each of the questions about the voting system set out in Parts A and B of the referendum voting paper in Schedule 1.
(2) Despite the form of the referendum voting paper in Schedule 1, the order of the options for the question in Part B of the referendum voting paper—
(a) must be determined by the Chief Electoral Officer by lot; and
(b) must not be listed in the order set out in the form in Schedule 1, unless that order is the result of the determination made under paragraph (a).
(2) Schedule 2 sets out the key characteristics of—
(a) the mixed member proportional representation voting system; and
(b) each of the options for the question in Part B of the referendum voting paper.