For some Governments, it would be preferable to deal with the two sources in separate provisions; for others, mention should also be made either of bilateral custom or obligations arising from unilateral acts.
有些国家政府认为，应该用两个条款分开处理这两个来源， 另有一些国家政府认为还应提及双边习惯或单方面行动产生的义务。