Apparently the union wants to go to court.
http://news.nationalpost.com/2011/06...tion-in-court/
“We want to challenge the government legislating us back to work at less than what the corporation offered at a time when the cost of living is far greater than what the government has imposed upon us,” Mr.Deveau said.
Maybe just get back to work rather than trying to force your employer to create "make work projects?"