Montana Title 7. Local Government § 7-2-2212. Exclusions and additions of territory upon petition

(1) Except as provided in subsection (3), on final hearing, the board of commissioners, upon petition of not less than 50% of the registered electors (as shown by the official registration records on the day of the filing of the petition) of any territory lying within the proposed new county and contiguous to the boundary line of the proposed new county and of the old county from which such territory is proposed to be taken and lying entirely within the single old county and described in the petition, asking that this territory not be included within the proposed new county, must make such changes in the proposed boundaries as will exclude the territory from the new county and shall establish and define the boundaries. Petitions for exclusion shall be disposed of in the order in which they are filed with the clerk of the board.

(2) Except as provided in subsection (3), on final hearing, the board, upon petition of not less than 50% of the registered electors of any territory lying outside the proposed new county and contiguous to the boundary line of the proposed new county and of the old county or counties from which such territory is proposed to be taken, asking that this territory be included within the proposed new county, must make such changes in the proposed boundaries as will include such territory in the new county and shall establish and define the boundaries.

(4) On final determination of boundaries, no changes in the boundaries originally proposed may be made except as prayed for in the petition or petitions or to correct clerical errors or uncertainties.