How often (or with what regularity) is an individual or company statutorily obligated to file (and have recorded), a Statement of Claim of Severed Mineral Interest In the State or North Dakota?
If you arent leasing it and there is no production, every 20 years
agree with @bob77. every 20 years. I just did this for my family a couple of years ago. make sure you follow all the specific filing guidelines as to fonts / margins / etc. some counties can be very picky.