N.D. Cent. Code § 57-33.2-11: Commissioner to audit reports and state board of equalization to assess tax

The commissioner may audit reports of distribution companies and transmission companies not later than three years after the due date of the report, or three years after the report was filed, whichever period expires later. The state board of equalization shall assess the tax and, if any additional tax is found due, the commissioner shall notify the taxpayer in detail as to the reason for the increase.