Арбитражный регламент ЮНСИТРАЛ 2010 года (с новым пунктом 4 статьи 1, принятым в 2013 году)

1. If the parties have not previously agreed on the number of arbitrators, and if within 30 days after the receipt by the respondent of the notice of arbitration the parties have not agreed that there shall be only one arbitrator, three arbitrators shall be appointed.

2. Notwithstanding paragraph 1, if no other parties have responded to a party’s proposal to appoint a sole arbitrator within the time limit provided for in paragraph 1 and the party or parties concerned have failed to appoint a second arbitrator in accordance with article 9 or 10, the appointing authority may, at the request of a party, appoint a sole arbitrator pursuant to the procedure provided for in article 8, paragraph 2, if it determines that, in view of the circumstances of the case, this is more appropriate.