North Dakota Constitution Art. V, § 9

Every bill passed by the legislative assembly must be presented to the governor for the governor's signature. If the governor signs the bill, it becomes law.

The governor may veto a bill passed by the legislative assembly. The governor may veto items in an appropriation bill. Portions of the bill not vetoed become law.

The governor shall return for reconsideration any vetoed item or bill, with a written statement of the governor's objections, to the house in which it originated. That house shall immediately enter the governor's objections upon its journal. If, by a recorded vote, two-thirds of the members elected to that house pass a vetoed item or bill, it, along with the statement of the governor's objections, must immediately be delivered to the other house. If, by a recorded vote, two-thirds of the members elected to the other house also pass it, the vetoed item or bill becomes law.

While the legislative assembly is in session, a bill becomes law if the governor neither signs nor vetoes it within three legislative days after its delivery to the governor. If the legislative assembly is not in session, a bill becomes law if the governor neither signs nor vetoes it within fifteen days, Saturdays and Sundays excepted, after its delivery to the governor.