D.C. Code § 16-4409: Initiation of arbitration.

(a)

A person initiates an arbitration proceeding by giving notice in a record to the other parties to the agreement to arbitrate by certified or registered mail, return receipt requested and obtained, or by service as authorized for the commencement of a civil action. The notice shall describe the nature of the controversy and the remedy sought.

(b)

Unless a person objects for lack or insufficiency of notice under § 16-4415(c) not later than the beginning of the arbitration hearing, the person, by appearing at the hearing, waives any objection to lack of or insufficiency of notice.