UNCITRAL's MODEL Law on Arbitration (ML) was a great success.1 In the 20 years that have elapsed since its recommendation by the General Assembly of the UN in its Resolution of 15 December 1985, some 50 states from all parts of the world have adopted the ML for their national arbitration legislation. The ML was conceived for international commercial arbitration, but a large number of states adopted the ML also for domestic arbitration.2 In 2000, UNCITRAL embarked on a revision of the ML and established a Working Group to prepare this revision. This was preceded by a Note of its Secretariat of 6 April 1999 on Possible Future Work of UNCITRAL in the Field of International Commercial Arbitration.3 This Note mentions 13 topics for consideration. Three topics were given priority: conciliation, interim measures of protection and the written form of the arbitration agreement. For conciliation a remarkably quick result has been reached. In three sessions a new Model Law on International Commercial Conciliation was achieved. It was recommended by the General Assembly of the UN on 19 November 2002.4 On the two other topics, art. 17 on interim measures of protection and art. 7 which requires ‘in writing’ for the arbitration agreement, no final solution has as yet been reached. The revision of the ML will not be ended when, as may be expected in 2006, agreement has been reached on the two other topics which were given priority. Thereafter, the 10 topics mentioned in the Secretariat's Note of 6 April 1999 remain. They will be discussed in section II(A)–(J) infra . However, first of all a survey of all articles of the ML will be given in section I. A revision of the ML would, in my opinion, not be complete if no attention were …