4The number of regional member seats for a region shall be—
(a)one eighth of the total number of regional member seats, or
(b)(if that total number is not exactly divisible by eight) either one eighth of the highest number which is less than that total number and exactly divisible by eight or the number produced by adding one to one eighth of that highest number (as provided by sub-paragraphs (2) to (4)).
(2)If the total number of regional member seats is not exactly divisible by eight, the Commission shall calculate the difference between—
(a)the total number of regional member seats, and
(b)the highest number which is less than that total number and exactly divisible by eight,
and that is the number of residual seats to be allocated by the Commission.
(3)The Commission shall not allocate more than one residual seat for a region.
(4)The Commission shall divide the regional electorate for each region by the aggregate of—
(a)the number of constituencies in the region, and
(b)one eighth of the highest number which is less than the total number of regional member seats and exactly divisible by eight,
and, in allocating the residual seat or seats for a region or regions, shall have regard to the desirability of allocating the residual seat or seats to the region or regions for which that calculation produces the highest number or numbers.