46 C.F.R. § 503.40
(a) Service of summonses and complaints.
(1) Except in cases in which the Commission is represented by legal counsel who have entered an appearance or otherwise given notice of their representation, only the General Counsel is authorized to receive and accept subpoenas, or other demands or requests directed to the Commission, or any component thereof, or its employees, or former employees, whether civil or criminal nature, for:
(3) In the event that any subpoena, demand, or request is sought to be delivered to a Commission employee (including former employees) other than in the manner prescribed in paragraphs (a)(1) and (2) of this section, such attempted service shall be ineffective. Such employee shall, after consultation with the General Counsel: