515 ILCS 5/1-60

"Mussel devices" includes any rake, fork, crow-foot bar, dredge, or air breathing device described as follows: (i) rake or fork: any rake or fork with forks or tines used for collecting or assembling mussels; (ii) crow-foot bar: a bar of any material equipped with a series of hooks designed to take mussels by the insertion of the hooks between the shells of mussels; (iii) dredge: any hand operated dredge with openings not larger than 2 feet in width used for taking mussels; and (iv) air breathing device: any air breathing apparatus that is attached to a diver and is used during the collecting of mussels.