Are green iguanas legal pets in Maine?

It is my understanding that at this time iguanas can not be sold or purchased in Maine. Iguanas that were being kept as pets at the time the law was passed could remain with their owners but could not be sold. I've heard that it is possibe to get a permit to keep iguanas, box turtles, or other prohibited species, but I've also heard it is next to impossible to obtain such a permit.