In a decision that could have implications for years going forward, the US Supreme Court ruled 5-4 that public employees do not have to pay agency fees to their workplace’s union.

The case, brought by Illinois state employee Mark Janus against the American Federation of State, County and Municipal Employees local, overturned an earlier SCOTUS ruling that said public workplace unions could mandate employees pay into the union to cover collective bargaining and other workplace related expenses.

The Pennsylvania Utility Commission ordered 17 state utility companies to pass rate credits — estimated at $324 million annually — on to their customers this week, due to the impact of the 2017 federal tax cuts.