N.C. Gen. Stat. § 106-624

It shall be the duty of the Commissioner to cause to be prepared and furnished for a fee of ten dollars ($10.00) each to all grain dealers, as defined in this Article, in the State a sign not less than 11 x 15 inches, which shall contain information that it is a violation of law for any person to sell, offer for sale or deliver adulterated grain. Said sign shall also set out the penalties for violation of this Article. Duplicate signs, and replacement for signs lost, stolen, worn or otherwise unusable, shall be purchased from the Department of Agriculture and Consumer Services for a fee of five dollars ($5.00) per sign.