Upon a determination that hazardous forest fire conditions exist the Commissioner is authorized to cancel any permit issued under this Article and suspend the issuance of any new permits. Upon a determination by the Environmental Management Commission or its agent that open burning permitted under this Article is causing significant contravention of ambient air quality standards or that an air pollution episode exists pursuant to Article 21B of Chapter 143 of the N.C. Gen. Stat., the Commissioner shall cancel any permits issued under authority of this Article and shall suspend the issuance of any new permits. (1981, c. 1100, s. 2; 2011-145, s. 13.25(w), (x).)