(a) Within ten (10) calendar days of receipt of each request for binding arbitration, the appraisal district shall complete the appropriate tasks using the comptroller's online arbitration system or in the manner set out below if using the paper-based arbitration system as follows:      
        (1) assign a unique arbitration number to each request;       
        (2) complete and sign that portion of the comptroller's Request for Binding Arbitration form applicable to the appraisal district, based on the examination of the documentation submitted; and       
        (3) forward, pursuant to subsection (d) of this section, each Request for Binding Arbitration form, the accompanying deposit, the ARB order (as well as the appointment of agent form 50-791, if provided), and supporting documentation for any items not checked in the appraisal district portion of the Request for Binding Arbitration form, if applicable, to the comptroller's office.       
      (b) The appraisal district shall provide promptly any additional information the comptroller's office requests to process the request for binding arbitration submission.     
      (c) The appraisal district shall deliver the materials identified in subsection (a)(3) of this section to the comptroller by hand delivery or by certified first-class mail, and must simultaneously deliver a copy of the submission to the owner or agent, as appropriate, by regular first-class mail or electronic mail.     
     Source Note:        The provisions of this §9.4254 adopted to be effective May 29, 2018, 43 TexReg 3459; amended to be effective December 31, 2019, 44 TexReg 8327