The installation of a vacuum pump or other device for the purpose of putting vacuum on any gas or oil-bearing formation, or the application of any vacuum to any gas or oil-bearing formation is prohibited, except as follows.     
       (1) If casinghead gas is utilized in a casinghead-gas plant, vacuum may be used, but no more than is sufficient to gather the gas and deliver it at the plant. In no event shall more than two points of vacuum (two inches of mercury) be used at the casinghead.       
         (2) In a field which is depleted or practically depleted vacuum may be used, but no vacuum pump shall be installed or used without a permit from the commission obtained upon application after notice to adjacent lease owners and operators and a public hearing on such application.        
     Source Note:        The provisions of this §3.23 adopted to be effective January 1, 1976.