The case was initiated by a mill worker from Madawaska who hurt his back at the Twin Rivers Mill.
Gaetan Bourgoin uses marijuana to control pain and doesn't want to use narcotics.
Bourgoin has already won a ruling by the Maine Compensation Board, but Twin Rivers refused to pay for it. It says paying for medical marijuana will violate federal law and also argues Maine's law does not require a private health insurer to cover the cost.
No word on when the Supreme Judicial Court will rule on the matter.