 Following the 2017 reapportionment, the total number of members increased from 150 to 151.Section 24 of the Constitution requires that electorates be apportioned among the States in proportion to their respective populations; provided that each original State has at least 5 members in the House of Representatives.Section 29 of the Constitution forbids electorate boundaries from crossing state lines, and the "Commonwealth Electoral Act 1918" sets out further requirements.