In UT the open range law states that to keep livestock off of deeded land you are responsible for the fencing of your land. If livestock wander from deeded to public lands the enforcement of the tresspass is up to the managing agency, which here is usually not the state but either the BLM or USFS. The state sections are often included in a fed. administered allotment, but the price/AUM for that land is set by the state and goes to the state. The administration of the land is done by the fed. agency through an agreement.