N.D. Cent. Code § 24-06-10
In all places where highways are improved and graded under the contract system in a township where land contiguous to, adjoining, and outside of the limits of any city has been surveyed into a block or blocks and divided into city lots, the person to whom such contract is awarded shall comply strictly with the ordinances of such city as to roads, streets, grades, space for sidewalks, berms, and gutters, if, in the opinion of the board of township supervisors having control of the same, the cost of such grading is one hundred dollars or upwards. An estimate, profile, and cross section of such desired improvement must be made by the county surveyor of said county, and the contract for such improvement must be let to the lowest responsible bidder not a member of the said board and the work done under such contract may not be accepted or paid for until said surveyor has reported that the said contract has been complied with substantially. All roads and streets in city additions of outlots must be graded according to the requirements of such city ordinance or custom as to space for sidewalks, berms, and gutters.
N.D.C.C. § 24-06-10