(1) When two (2) or more separately owned tracts are embraced within an established drilling unit, when there are separately owned interests in all or part of the drilling unit, or when there are separately owned tracts and separately owned interests in all or part of such a drilling unit, the owners thereof may voluntarily pool, combine, and integrate their tracts or interests for the development or operation of that drilling unit.
(2) When the owners fail or refuse voluntarily to integrate their interests, upon the application of any such owner or operator, the commission, for the prevention of waste or to avoid the drilling of unnecessary wells, shall enter its order integrating all tracts and interests in the drilling unit for the development or operation of the drilling unit and the sharing of production from the drilling unit.