N.C. Gen. Stat. § 106-568.28

In the event any referendum authorized by this Article is carried in the affirmative by such two-thirds vote and the assessment is levied and collected as herein provided and under the regulations to be promulgated by the board of directors of Tobacco Associates, Incorporated, any farmer or tobacco producer upon whom and against whom any such annual assessment shall have been levied and collected under the provisions of this Article, if dissatisfied with the said assessment, shall have the right to demand of and receive from the treasurer of said Tobacco Associates, Incorporated, a refund of such annual assessment so collected from such farmer or producer of tobacco, provided such demand for refund is made in writing within 30 days from the last date on which such assessment is collected from such farmer or producer or deducted from the proceeds of the sale of tobacco of such farmer or producer.