 The most important and high profile of the committees are the pairs of standing committees . These each have six members . The chairman of each legislation committee is chosen from amongst the government members , the deputy chair from amongst non @-@ government members . The reverse is the case for the references committees . Because the chair has a casting vote in the event of a committee vote being tied , the government effectively controls the legislation committees , while the non @-@ government parties control the references committees . 
