On receipt of a petition, the clerk of the Tax Court immediately shall issue a subpoena that requires the appropriate tax determining agency to produce at a hearing before the Tax Court: the record of the proceeding from which the appeal is taken or a certified copy of the record; and any map, plat, or other document that is connected with the record. On request of a party, the Tax Court shall issue a subpoena that requires at a hearing before the Tax Court: the appearance of a witness to testify; and the production of any pertinent document. A subpoena issued under this section or § 13-521 of this subtitle shall be served by: the sheriff or deputy sheriff of the jurisdiction in which the person subpoenaed is found; the clerk or a deputy clerk of the Tax Court; certified mail, return receipt requested; or a private process server.