constituencies as aforesaid shall be allocated between the contesting parties in accordance with the results of the voting throughout Guyana in favour of the lists of the contesting parties in such a manner that the proportion that the number of seats allocated to each party, when added to the number of members identified with that party's lists elected in the geographical constituencies, bears to the number of votes cast in favour of that party is as nearly as may be the same for each party, thus minimising the level of disproportionality between the percentages of votes earned by parties and the percentages of seats allocated to parties in the Assembly. (3) Subject to the provisions of this Constitution, Parliament may make provision (a) (i) for the registration of electors; (ii) for the manner in which lists of candidates shall be prepared, including the provision in a list of the names of a sufficient number of candidates to enable any vacancies to be filled under subparagraph (vii), and which manner shall allow voters to be sure which individuals they are electing to the National Assembly; (iii) for the manner in which the number of seats to be allocated to each list shall be calculated in order to give effect to the provisions of paragraph (1) or paragraph (2), as the case may be; (iv) for the combination of lists of candidates for the purpose of the allocation of seats (but not for the purpose of voting);