(a) On any substantive matter regarding facts, issues, law, or rules, an arbitrator may not communicate with any party outside the arbitration unless the communication is:      
        (1) in writing; and       
        (2) a copy is delivered to all parties to the arbitration.       
      (b) Notwithstanding subsection (a) of this section, any party may communicate with the arbitrator concerning any procedural matter.     
     Source Note:        The provisions of this §144.2 adopted to be effective December 31, 1991, 16 TexReg 7358; amended to be effective May 31, 2012, 37 TexReg 3856