N.D. Cent. Code § 18-07-06: When prairie may be set on fire to make firebreak

For the purpose of making a firebreak, a strip of prairie not exceeding one hundred feet [30.48 meters] in width, protected on each side by a strip of plowed or burned land not less than five feet [1.52 meters] wide, may be set on fire. At least four men must be present when the prairie is burned and must be prepared, with water and suitable appliances, to keep the fire under control.