Industrial action will be more likely as result of the bill - STUCpublished at 10:29
Dave Moxham from the Scottish Trades Union Congress says it is fundamentally wrong that an abstention should be considered as a no vote in a strike ballot.
Mr Moxham says there is essentially a three part democratic process to achieving strike action.
He says unions take a view to how likely the third part, industrial action, is going to be successful.

The National Museum of Scotland workers strike over weekend allowances during the 2015 Edinburgh Festival
Mr Moxham says there is a lot of misunderstanding of the process and there are quite a lot of stopping off points in it.
The government, through thresholds and other changes, is making that situation a sharper one for unions, who will have to make decisions quicker and more aggresively, he says.
Industrial action will be more likely, says the STUC representative.