Edited sentence: In retaliation to the ATU filing a ULP earlier in 2010, TriMet implemented a wage freeze requiring all employees to pay their increases in healthcare premiums and changing insurance plans after the union contract expired without first discussing it with the union.On January 3, 2013, TriMet was found by The Oregon Employment Relations Board to be in violation of ORS 243.672 by restricting the ATU 757 from attending contract negotiation hearings