33 C.F.R. § 138.150 Service of process.
Title 33 - Navigation and Navigable Waters
(a) When executing the forms required by this part, each applicant and guarantor shall designate thereon a person located in the United States as its agent for service of process for purposes of this part and for receipt of notices of designations and presentations of claims under the Acts (collectively referred to as “service of process”). Each designated agent shall acknowledge the designation in writing unless the agent has already furnished the Director, NPFC, with a “master” (i.e., blanket) concurrence showing that it has agreed in advance to act as the United States agent for service of process for the applicant, certificant, or guarantor in question. (b) If any applicant, certificant, or guarantor desires, for any reason, to change any designated agent, the applicant, certificant, or guarantor shall notify the Director, NPFC, of the change and furnish the relevant information, including the new agent's acknowledgment in accordance with paragraph (a) of this section, if a “master” concurrence is not applicable. In the event of death, disability, or unavailability of a designated agent, the applicant, certificant, or guarantor shall designate another agent in accordance with paragraph (a) of this section within 10 days of knowledge of any such event. The applicant, certificant, or guarantor shall submit the new designation to the Director, NPFC. The Director, NPFC, may revoke a certificate if an applicant, certificant, or guarantor fails to designate and maintain an agent for service of process. (c) If a designated agent can not be served because of death, disability, unavailability, or similar event and another agent has not been designated under this section, then service of process on the Director, NPFC, will constitute valid service of process. Service of process on the Director, NPFC, will not be effective unless the server— (1) Sends the applicant, certificant, or guarantor (by registered mail, at its last known address on file with the Director, NPFC), a copy of each document served on the Director, NPFC; and (2) Attests to this registered mailing, at the time process is served upon the Director, NPFC, indicating that the intent of the mailing is to effect service of process on the applicant, certificant, or guarantor and that service on the designated agent is not possible, stating the reason why.
Title 33: Navigation and Navigable Waters
PART 138—FINANCIAL RESPONSIBILITY FOR WATER POLLUTION (VESSELS)
§ 138.150 Service of process.

