N.D. Cent. Code § 57-38-03: Imposition of tax against nonresidents

The tax imposed by this chapter must be levied, collected, and paid annually upon and with respect to income derived from all property owned, from all gaming activity carried on in this state, and from every business, trade, profession, or occupation carried on in this state by natural persons not residents of the state at the rates specified with respect to net income of a resident of North Dakota.