Del. Rap. Arbit. R. 12
Not later than two business days after service of the written notice of acceptance of appointment by the Arbitrator, the claimant shall serve upon all other parties a complaint giving notice of its claims and the remedies sought. If the dispute giving rise to the Arbitration is already the subject of litigation, then the complaint shall include copies of the pleadings in such litigation.
Within five business days after service of the complaint, or such other time as the Arbitrator may allow, each party against whom relief is sought shall, and any other party may, serve an answer setting forth its response to the claims and remedies sought in the complaint and any affirmative defenses (including jurisdictional challenges) or counterclaims it may wish to assert in the Arbitration. If the answer asserts counterclaims, a party against whom a counterclaim is asserted may serve a reply within three business days after service of the answer, or within such other time as the Arbitrator may allow.
The failure of a party to answer a complaint or reply to counterclaims shall not operate to delay the Arbitration.
Del. Rap. Arbit. R. 12