Mussels may be taken only during the period of April 1 to September 30, both inclusive, and then only from sunrise to sunset and only by means of crowfoot bars or hand picking, with or without the aid of air breathing apparatus. Mussels may be taken from the Mississippi, Ohio, Wabash, and Illinois rivers. Mussel fishing is permitted in other waters only upon written authorization from the Department.
515 ILCS 5/15-35