The Supreme Court says a union must give nonmembers an immediate chance to object to unexpected fee increases that all workers are required to pay in closed-shop situations. The court on Thursday ruled for Dianne Knox and other nonmembers of the Service Employees International Union’s Local 1000, who wanted to object and opt out of a $12 million special assessment the union required from its California public sector members. Knox and others said the union did not give them a legally required notice that the increase was coming.