A rather complicated set of rules deals with rounding decimal results up or down, and ensures that the smaller a constituency is, the more strictly proportional its parliamentary representation will be. Another set of rules apportions the 50 seat premium for the largest-tallying party among constituencies. Individual seats are apportioned by "cross of preference". Voters mark a cross next to the name of the candidate or candidates they prefer, the number of crosses varying from one to five depending on constituency size. Ballots with no crosses or more crosses than allowed, count for only the party but not the individual candidates.