Ministers and Office Holders Minister Parliamentary Secretary Presiding Officer Senior Office Holder who is a Member of the Opposition Leader of a Minority Party Shadow Minister Whip Other Office Holder Others Senator All Senators except NT Senators NT Senator Member Member representing an Electorate up to 5,000km2 Member representing an Electorate 5,000-25,000km2 Member representing an Electorate 25,000-300,000km2 Member representing an Electorate 350,000km2 +