Illegal possession of mercury consists of possessing more than one pound of mercury without also possessing a bona fide bill of sale or other instrument in writing relating to the mercury in possession stating the name and address of the seller, the name and address of the purchaser, the date of the sale, the amount sold and the price paid therefor; provided however, this section shall not be applicable to any person engaged in the business of mining, processing mercury, or to any person using mercury as an integral part of a tool, instrument or device in his business, or to a law enforcement officer in discharge of his duties.
Whoever commits illegal possession of mercury is guilty of a fourth degree felony.