7. No internal quantitative regulation relating to the mixture, processing or use of products in specified amounts or proportions shall be applied in such a manner as to allocate any such amount or proportion among external sources of supply.
该义务基本可以分成三类：第一类涉及国内税费；第二类涉及影响产品销售等的国内法律、规章；第三类涉及对进口产品的混合、加工或使用实施国内数量管理时，不能强制要求生产者使用特定数量或比例的国内产品。
