MONTPELIER (AP) - In a rare legal proceeding, the state Supreme Court is to hear arguments that the Vermont Yankee nuclear plant is continuing to run in violation of a 2002 order by the Public Service Board.

The anti-nuclear group New England Coalition is asking the court to intervene in what it says is plant owner Entergy Corp.'s disobedience of the board order that allowed Entergy to buy Vermont Yankee.

A memorandum of understanding agreed to by Entergy and the state was incorporated into the board's decision as a condition that Vermont Yankee would shut down if it didn't have a new state permit by March 21, 2012. The plant continues to run without a new permit.

Entergy has argued it was blocked from getting the new permit by interference from the Legislature.