(a) Under this part, a party may serve any pleading or document by regular mail. Service on a party is complete upon mailing to the last known address. No additional time for filing or response is authorized where service is by mail. In the interest of expeditious proceedings, the ALJ may direct the parties to serve pleadings or documents by a method other than regular mail.

(b) Two copies of all pleadings and other documents in any ALJ proceeding must be served on the attorneys for the Administrator, WHD. One copy must be served on the Associate Solicitor, Division of Fair Labor Standards, Office of the Solicitor, U.S. Department of Labor, 200 Constitution Avenue NW., Room N-2716, Washington, DC 20210, and one copy must be served on the attorney representing the Administrator in the proceeding.

(c) Time will be computed beginning with the day following service and includes the last day of the period unless it is a Saturday, Sunday, or Federally-observed holiday, in which case the time period includes the next business day.