(b) Whenever a statute of the United States provides for a maritime action in rem or a proceeding analogous thereto. Except as otherwise provided by law a party who may proceed in rem may also, or in the alternative, proceed in personam against any person who may be liable. Statutory provisions exempting vessels or other property owned or possessed by or operated by or for the United States from arrest or seizure are not affected by this rule. When a statute so provides, an action against the United States or an instrumentality thereof may proceed on in rem principles.
(b) describe with reasonable particularity the property that is the subject of the action; and
(c) state that the property is within the district or will be within the district while the action is pending.
(ii) If the plaintiff or the plaintiff’s attorney certifies that exigent circumstances make court review impracticable, the clerk must promptly issue a summons and a warrant for the arrest of the vessel or other property that is the subject of the action. The plaintiff has the burden in any post-arrest hearing under Rule E(4)(f) to show that exigent circumstances existed.
(ii) If the property that is the subject of the action is other property, tangible or intangible, the warrant and any supplemental process must be delivered to a person or organization authorized to enforce it, who may be:
(B) someone under contract with the United States;
(C) someone specially appointed by the court for that purpose; or,
(D) in an action brought by the United States, any officer or employee of the United States.
(d) Supplemental Process. The clerk may upon application issue supplemental process to enforce the court’s order without further court order.
(5) ANCILLARY PROCESS. In any action in rem in which process has been served as provided by this rule, if any part of the property that is the subject of the action has not been brought within the control of the court because it has been removed or sold, or because it is intangible property in the hands of a person who has not been served with process, the court may, on motion, order any person having possession or control of such property or its proceeds to show cause why it should not be delivered into the custody of the marshal or other person or organization having a warrant for the arrest of the property, or paid into court to abide the judgment; and, after hearing, the court may enter such judgment as law and justice may require.
(6) RESPONSIVE PLEADING; INTERROGATORIES.
(B) within the time that the court allows;
(iii) an agent, bailee, or attorney must state the authority to file a statement of right or interest on behalf of another; and
(iv) a person who asserts a right of possession or any ownership interest must serve an answer within 21 days after filing the statement of interest or right.
