; jurisdiction (1) By whom served Any civil investigative demand issued under subsection (a) may be served by an appropriate investigator, or by a United States marshal or deputy marshal, at any place within the territorial jurisdiction of any court of the United States. (2) Service in foreign nations Any such demand or petition filed under subsection (k) may be served upon any person who is not to be found within the territorial jurisdiction of any court of the United States, in such manner as the Federal Rules of Civil Procedure prescribe for service in a foreign country. To the extent that the courts of the United States can assert jurisdiction over any such person consistent with due process, the United States District Court for the District of Columbia shall have the same jurisdiction to take any action respecting compliance with this Act by any such person that such court would have if such person were personally within the jurisdiction of such court. (e) Service upon legal entities and natural persons (1) Legal entities Service of any civil investigative demand issued under subsection (a) or of any petition filed under subsection (k) may be made upon a partnership, corporation, association, or other legal entity by— (A) delivering a duly executed copy of such demand or petition to any partner, executive officer, managing agent, or general agent of the partnership, corporation, association, or entity, or to any agent thereof authorized by appointment or by law to receive service of process on behalf of such partnership, corporation, association, or entity; (B) delivering a duly executed copy of such demand or petition to the principal office or place of business of the partnership, corporation, association, or entity to be served