N.D. Cent. Code § 23-09-11

Every lodging establishment, food establishment, or assisted living facility must be inspected at least once every two years by the department. Food establishments and assisted living facilities must be inspected based on a system of risk categorization which involves types of foods served, the preparation steps these foods require, volume of food, population served, and previous compliance history. The department and its inspectors may enter any such establishment at reasonable hours to determine compliance with this chapter.