Section 21. Commencement of arbitral proceedings

21. Commencement of arbitral proceedings.— Unless otherwise agreed by the parties, the arbitral proceedings in respect of a particular dispute commence on the date on which a request for that dispute to be referred to arbitration is received by the respondent. 21. The arbitrator has within the past three years served as counsel against one of the parties or an affiliate of one of the parties in an unrelated matter.