Options for Licensure as a NC Irrigation Contractor. An applicant must have a minimum of three years experience in irrigation contracting, or two years training, plus one year in the field.At NIKE, we embrace the power of sport to move the world forward. Sport brings people together in a way that few other things can. This guide provides information for insurance agents to help contractors obtain a North Carolina Irrigation Contractor Bond. (17) Any person who can document 10 years in business as an irrigation contractor as of January 1, 2009, can document competency in the practice of irrigation.