The content is wide, which mainly includes international environment protection treaties, national environment rules of law, standards, voluntary measurements and internal requirements.
绿色壁垒内容十分广泛，主要包括国际环保公约、国别环保法规和标准、自愿性措施及内在化要求。
Should the IAEA's safety rules stay voluntary?
IAEA安全规则还应保持自愿性质么？
Enterprises make applications on a voluntary basis. Certification bodies assess feeds, feed additives and their production process in accordance with relevant standards and technical rules.
企业自愿申请，认证机构对饲料和饲料添加剂产品及其生产过程按照有关标准或者技术规范要求进行合格评定。
Consider just the following passage from chapter 30, section 21. Hobbes writes: "For the use of laws, which are but rules authorized," he says, "is not to bind the people from all voluntary actions."
请大家想想30章第21部分，霍布斯的这段话：，法律的妙用，也即那些经君主授权的规章制度的用途，不是要约束人民，做那些他们本该做的事。
Article 4 Insurance activities shall be conducted in compliance with laws and administrative rules and regulations, with respect for public morality and on the principle of voluntary participation.
第四条从事保险活动必须遵守法律、行政法规，尊重社会公德，遵循自愿原则。
Article 4 Insurance activities shall be conducted in compliance with laws and administrative rules and regulations, with respect for public morality and on the principle of voluntary participation.
第四条从事保险活动必须遵守法律、行政法规，尊重社会公德，遵循自愿原则。
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