81-6-206. Formation of county district authorized -- petition of cattle owners -- declaration by county commissioners. A cattle protective district embracing part of one county in the state of Montana may be formed upon the filing of a petition by cattle growers within said district with the board of county commissioners in said county. Such petition must be signed by at least 51% of the cattle owners owning 55% of the cattle for the protection of which the district is to be formed residing within the area designated. Upon receipt of such petition, the board of county commissioners must within 30 days declare the designated portion of its county a cattle protective district and the district shall be formed immediately thereafter.