(a) Filing of documents. A document is filed in the office where the filing is required only when the document is received in that office during its regular business hours and by a person authorized to receive it. A document received after the office's regular business hours is considered filed on the next business day.

(b) Service generally. A copy of each document filed in a proceeding before the Office of Hearings and Appeals must be served by the filing party on the other party or parties in the case, except as otherwise provided by § 4.31. In all cases where a party is represented by an attorney, such attorney will be recognized as fully controlling the case on behalf of his/her client, and service of any document relating to the proceeding shall be made upon such attorney in addition to any other service specifically required by law or by order of a presiding official or an appeals board. Where a party is represented by more than one attorney, service upon one of the attorneys shall be sufficient.

(c) Retention of documents. All documents, books, records, papers, etc., received in evidence in a hearing or submitted for the record in any proceeding before the Office of Hearings and Appeals will be retained with the official record of the proceedings. However, the withdrawal of original documents may be permitted while the case is pending upon the submission of true copies in lieu thereof. When a decision has become final, an appeals board in its discretion may, upon request and after notice to the other party or parties, permit the withdrawal of original exhibits or any part thereof by the party entitled thereto. The substitution of true copies of exhibits or any part thereof may be required by the Board in its discretion as a condition of granting permission for such withdrawal. Transcripts of testimony and/or documents received or reviewed pursuant to § 4.31 of these rules shall be sealed against disclosure to unauthorized persons and retained with the official record, subject to the withdrawal and substitution provisions hereof.

(d) Record address. Every person who files a document for the record in connection with any proceeding before the Office of Hearings and Appeals shall at the time of his initial filing in the matter state his address. Thereafter he must promptly inform the office in which the matter is pending of any change in address, giving the docket or other appropriate numbers of all matters in which he has made such a filing. The successors of such person shall likewise promptly inform such office of their interest in the matters and state their addresses. If a person fails to furnish a record address as required herein, he will not be entitled to notice in connection with the proceedings.

(e) Computation of time for filing and service. Except as otherwise provided by law, in computing any period of time prescribed for filing and serving a document, the day upon which the decision or document to be appealed from or answered was served or the day of any other event after which the designated period of time begins to run is not to be included. The last day of the period so computed is to be included, unless it is a Saturday, Sunday, Federal legal holiday, or other nonbusiness day, in which event the period runs until the end of the next day which is not a Saturday, Sunday, Federal legal holiday, or other nonbusiness day. When the time prescribed or allowed is 7 days or less, intermediate Saturdays, Sundays, Federal legal holidays and other nonbusiness days shall be excluded in the computation.

(f) Extensions of time.