how joint decisions are to be taken with respect to the supply of material or services, and agreed circumstances justifying a denial of supply (e.g. for reasons unrelated to non-proliferation, such as failure to fulfil commercial conditions);
e. 如何对材料或服务的供应以及对能够证明拒绝供应的理由（如由于未履行商业条件等与防扩散无关的理由）达成一致的情况共同作出决定；