Summer to determine state of union bill

The federal government is hoping cross bench senators warm to its bill to break up rogue unions over the summer.

Chief government negotiator Mathias Cormann needs support from Tasmanian independent Jacqui Lambie or the two One Nation senators in order to more easily deregister unions and ban officials.

"We will be working over the summer to gain the support of that one additional senator, or two addition senators, that we require in order to secure its passage," he told Sky News on Friday.