Section 607.021 - Livestock district characteristics(1) A livestock district must contain at least 2,000 acres.(2) A livestock district may not cross the boundaries of a county. Except as provided in subsection (3) of this section, the boundaries of a livestock district must follow subdivision lines of sections, section lines, township lines, donation land claim boundaries or lines, lakes, rivers, the boundary line of this state, public roads or county boundary lines.(3) The boundary of an established livestock district may be used as a boundary for a proposed livestock district if the districts are adjacent to each other and will have a common boundary line.(4) An area may be annexed to an existing livestock district only if the annexed area is contiguous with the livestock district and the district boundaries after annexation will meet the requirements in subsection (2) of this section.