N.D. Cent. Code § 24-10-01
Whenever the erection of cattle guards is necessary to complete an enclosure which includes land on both sides of any highway in the state, except a highway which has been designated as part of the state highway system, or to cross a section line pursuant to section 24-06-28, the board of county commissioners, if the cattle guard is to be erected across a county road or a section line subject to jurisdiction of the board of county commissioners, or the board of township supervisors, if the cattle guard is to be erected across a township road or a section line subject to jurisdiction of the board of township supervisors, may issue permission to any person, firm, or corporation to erect a cattle guard and gateway across the highway or section line upon the conditions hereinafter prescribed.
N.D.C.C. § 24-10-01