Except as otherwise provided in Tax Code, §41A.015(b)(1) or §41A.015(i), these rules, or other law, as applicable, the property owner, property owner's agent, ARB, appraisal district, and arbitrator, as applicable, may provide written communications, notifications, and materials to each other using email, first-class mail, or any other method acceptable to the intended recipient of the communication, notification, or materials. Any written communications, notifications, and materials provided to the arbitrator shall also be provided to all other parties to the arbitration.