when you short a stock you only have so long to cover...you don't get months to cover...
Of course you do. As long as you can continue to pay margin and maintenance, and don't get a buyin notice (which with pennies can happen even if you CAN pay margin and maintenance) you can keep a short position open forever.
It's simply the opposite of being long.
In this case, though, there was never significant short interest. Any MMs caught with some the day of the suspension could easily have covered as soon as trading resumed.