N.D. Cent. Code § 25-01.1-22
At the times and in the manner provided by the office of management and budget, the superintendent shall cause to be prepared triplicate estimates of all expenditures required for the institution. Two of the said triplicate estimates must be sent to the supervising department and the third must be kept by the superintendent. The supervising department may revise the estimates for supplies or other expenditures and shall certify that it has carefully examined the same and that the articles contained in such estimates as approved, or revised by it, are, to its best knowledge and belief, actually required for the use of the institution. An approved copy containing any revisions of the estimate by the supervising department must be forwarded by the supervising department to the office of management and budget which shall contract for the required purchases.
N.D.C.C. § 25-01.1-22