介绍性文本1.标题，生效和适用2.英国退出欧盟后对2016年《种薯（威尔士）条例》的修订3.在成员国或瑞士生产的种薯的销售4.在成员国或瑞士生产的种薯的销售:保留条款签名解释性说明

Introductory Text1.Title, commencement and application2.Amendment to the Seed Potatoes (Wales) Regulations 2016 consequent on the withdrawal of the United Kingdom from the European Union3.Marketing of seed potatoes produced in a member State or Switzerland4.Marketing of seed potatoes produced in a member State or Switzerland: saving provisionSignatureExplanatory Note