Interrogatories to Parties. After an appeal has been filed with the Appeals Board, a party may serve on the other party written interrogatories to be answered separately in writing, signed under oath by the person making the answer, and returned within 30 days, or another time period that is agreed to by the parties. All answers to interrogatories shall be prepared in the following form: The interrogatory in full; The answer in full, if any, filed to it; and The basis for any exception taken. A party may not, without leave of the Appeals Board, serve more than two sets of interrogatories or more than 30 interrogatories (including interrogatories subsidiary or incidental to, or dependent upon other interrogatories, however grouped, combined or arranged) except as provided in §A(3) of this regulation. Supplementation of Responses. Except in the case of a deposition, a party who has responded to a request or order for discovery and who obtains further material information before hearing shall supplement the response promptly. At the hearing, the answers may be used to the extent permitted by the Maryland Rules of Evidence. Admission of Facts. After an appeal has been filed with the Appeals Board, a party may serve upon the other party a request for the admission of specified facts. Within 30 days after service, or such other time period as agreed by the parties, the party served shall answer each requested fact or file objections. The factual propositions set out in the request shall be deemed admitted upon the failure of a party to respond to the request for admission. Production and Inspection of Documents. After an appeal has been filed with the Appeals Board, a party may serve upon the other party a request for production, inspection, and copying of any documents or objects not privileged, which reasonably may lead to the discovery of admissible evidence. Within 30 days after service, or such other time period as agreed by the parties, the party served shall produce for inspection and copying the documents requested or set forth appropriate grounds for objection.