(a) Service of complaints and compliance specifications. Complaints and accompanying notices of hearing, compliance specifications, and amendments to either complaints or to compliance specifications, shall be served upon all parties either personally or by registered or certified mail or by telegraph, or by leaving a copy thereof at the principal office or place of business of the person required to be served.
(b) Service of final orders and decisions. Final orders of the Board in unfair labor practice cases and administrative law judges' decisions shall be served upon all parties either personally or by registered or certified mail or by telegraph, or by leaving a copy thereof at the principal office or place of business of the person required to be served.
(c) Service of subpoenas. Subpoenas shall be served upon the recipient either personally or by registered or certified mail or by telegraph, or by leaving a copy thereof at the principal office or place of business of the person required to be served.
(d) Service of other documents. Other documents may be served by the Agency by any of the foregoing methods as well as regular mail, electronic mail or private delivery service. Such other documents may be served by facsimile transmission with the permission of the person receiving the document.
(e) Proof of service. In the case of personal service, or delivery to a principal office or place of business, the verified return by the individual so serving the same, setting forth the manner of such service, shall be proof of the same. In the case of service by mail or telegraph, the return post office receipt or telegraph receipt therefor when registered or certified and mailed or when telegraphed shall be proof of service of the same. However, these methods of proof of service are not exclusive; any sufficient proof may be relied upon to establish service.
(f) Service upon representatives of parties. Whenever these rules require or permit the service of pleadings or other papers upon a party, a copy shall also be served on any attorney or other representative of the party who has entered a written appearance in the proceeding on behalf of the party. If a party is represented by more than one attorney or representative, service upon any one of such persons in addition to the party shall satisfy this requirement. Service by the Board or its agents of any documents upon any such attorney or other representative may be accomplished by any means of service permitted by these rules, including regular mail. [60 FR 56236, Nov. 8, 1995, as amended at 79 FR 74489, Dec. 15, 2014]