N.C. Gen. Stat. § 90A-70
It is the purpose of this Article to protect the environment and public health, safety, and welfare by ensuring the integrity and competence of on-site wastewater contractors and inspectors; to require the examination of on-site wastewater contractors and inspectors and the certification of their competency to supervise or conduct the construction, installation, repair, or inspection of on-site wastewater systems; to establish minimum standards for ethical conduct, responsibility, training, experience, and continuing education for on-site wastewater system contractors and inspectors; and to provide appropriate enforcement procedures for rules adopted by the North Carolina On-Site Wastewater Contractors and Inspectors Certification Board.
N.C. Gen. Stat. § 90A-70