(h)  the number of the arbitrators, if agreed by the par­ties;

(i)  the place of arbitration, if agreed by the parties;

(j)  the preference, if any, of the claimant for the number of       the arbitrators and/or for the place of arbitra­tion, if          not agreed by the parties;

(k)  to the extent applicable, further particulars as to the         arbitral procedure, e.g., the nationality of arbitra­tors      as referred to in article 16(4).

4. The request for arbitration shall be filed in five copies.