Found the details below for Illinois...
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dnr.state.il.us/law3/ginseng%20regulations.htm
Dealer’s License
A Ginseng dealers license is required for each individual at a given location who is engaged in the purchase of ginseng from growers or harvesters. “Individual,” for the purpose of this Act, is defined as a person, partnership or corporation. Licenses are valid from April 1 of one year through March 31 of the following year. Dealers licenses are available to both residents and non-residents. The fee for a resident is $50.50 per year and for a non-resident $100.75 per year. Licenses are available through DNR Direct license and permit vendors, online through the website at DNR Direct or by phone toll free @ 1-888-673-7648. For further questions, call the Commercial License/Permit Office at 217/785-3423.
Certification
All ginseng purchased by licensed Illinois dealers must be certified as to kind (wild or cultivated), weight, and origin by a certification officer of the Department of Natural Resources, Office of Law Enforcement, before they can sell or ship it. Certification will only be accomplished within the borders of Illinois. Certification will be done by appointment only on Mondays, at selected locations throughout the state (all dealers are mailed the locations with their license or they may call the Office of Law Enforcement at 217/782-6431 to receive a copy). The ginseng roots and their purchase records must be examined by the officer prior to issuance of the certification papers. A copy of the Illinois Wild Ginseng Shipping Certificate must accompany shipments of Illinois ginseng for them to be legally exported from the United States. Procedures for certifying ginseng may vary from year to year. Licensed dealers will be notified of current procedures prior to the harvest season. Information on ginseng certification can be obtained by phoning the ginseng program manager at 217/782-6431. Certification of cultivated ginseng can occur at any time. Certifying of wild ginseng can only occur from the opening of the buying season until the following April 1. It is unlawful to have uncertified wild ginseng on hand from April 2 through the opening of the next buying season
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