46 CFR 502.116: Date of service.

The date of service of documents served by the Commission will be the date shown in the service stamp placed on the first page of the document. The date of service of documents served by parties will be the date when the document served is transmitted by email, deposited in the United States mail, delivered to a courier, or delivered in person. If service is made by more than one method, for example email and also U.S. mail service, the date of service will be the earlier of the two dates. In computing the time from such dates, the provisions of § 502.101 shall apply. [Rule 116.]