N.D. Cent. Code § 23-21-18
After the removal of all human remains interred in any part or the whole of the cemetery lands, the cemetery authority shall file for record in the office of the county recorder of the county or municipality in which the lands are situated a written declaration reciting that all human remains have been removed from the lands described in the declaration.
The declaration must be acknowledged in the same manner as acknowledgments of deeds to real property by the president and secretary, or other corresponding officers of the cemetery authority, or by the person owning or controlling the cemetery lands, and thereafter any deed, mortgage, or other conveyance of any part of such lands is conclusive evidence in favor of any grantee or mortgagee named therein, and that person's successor or assigns, of the fact of the complete removal of all human remains therefrom.
N.D.C.C. § 23-21-18