N.D. Cent. Code § 40-12-09

When a referendum petition is filed, the governing body of the municipality shall reconsider the ordinance described therein, and if it is not entirely repealed, the governing body shall submit it to the vote of the qualified electors of the municipality at the next regular municipal election or at a special election to be called for that purpose as provided in section 40-12-06. The ordinance shall not go into effect or become operative unless a majority of the qualified electors voting on the same shall vote in favor thereof. If the referred ordinance was not suspended by the filing of the referendum petition, it no longer shall be effective if it is disapproved by a majority vote of the qualified electors voting on the same.