North Dakota Century Code Title 38. Mining and Gas and Oil Production § 38-02-12. Amount of work to be done annually to hold possession of claim

The amount of work to be done or the improvements to be made during each year to hold possession of a mining claim must be the same as that prescribed by the applicable laws of the United States. The period within which the work required to be done annually on any unpatented claim so located commences on the first day of January succeeding the date of the location of such claim.