The original problem wasn't lack of fuel, it was inspection issues. They only ran out of fuel after being trapped and running the generators for electricity. In fact the ship probably still has a usable supply of bunker fuel on board so it wouldn't be that hard to get it to port, except that it is still trapped in the original legal limbo.

After 4 years of deferred maintenance the engines are going to need some TLC before they can be fired up again. The longer the ship sits idle the worse the situation becomes. Left long enough and some fitting somewhere will corrode through or be damaged in a storm and without power to run the pumps the ship will start slowly sinking.

you would probably have to pay the port fees until it is moved as well.