The scope of the provisions in regional agreements varies from the establishment of supranational rules and the harmonization of domestic legislation and practices to the adoption of common guiding principles and encouraging cooperation amongst national authorities.
12. 区域协定条款，有的涉及制定超国家规则和协调管理立法与做法，有的则制订共同指导原则并鼓励国家主管机构之间的合作。