Del. Rap. Arbit. R. 9
The parties to an Arbitration may choose an Arbitrator in conformity with the Arbitration Agreement, and if the Arbitrator so chosen by the parties agrees to serve as Arbitrator, then the Arbitration under the Act is commenced upon service by the Arbitrator upon all parties of a written notice of acceptance of appointment as Arbitrator. If a petition or application for appointment of an Arbitrator is filed with the Court of Chancery (whether on a consensual basis or otherwise), then an Arbitration under the Act is commenced upon entry of an order by the Court of Chancery under 10 Del. C. § 5805(b) appointing an Arbitrator, and the Arbitrator shall file with the Court of Chancery and serve upon the parties a written notice of acceptance of appointment as Arbitrator. The notice of acceptance shall set forth the Arbitrator's postal and electronic mail addresses and telephone and fax numbers, and shall specify the form in which written submissions to the Arbitrator shall be made.
Except as permitted by the Act, the time period specified in 10 Del. C. § 5808(b) shall commence upon service of the written notice of acceptance of appointment as Arbitrator (or, if more than one person is appointed as Arbitrator, upon service of the written notice of acceptance of appointment by the last such person to effect service).
Del. Rap. Arbit. R. 9