This Order, made by the Forestry Commissioners, in exercise of the powers conferred upon them by sections 2 and 3 of the Plant Health, provide measures for the control of international trade in any tree, wood, isolated bark, soil or growing medium ("relevant material") for the purpose of preventing the spreading of plant pests and diseases. Part 2 of the Order imposes restrictions and conditions on relevant material imported into Great Britain from third countries. Article 5 contains general prohibitions and restrictions on relevant material being landed in Great Britain. Part 3 of the Order contains the prohibitions and restrictions that apply to relevant material coming to Great Britain from other EC countries and to movement of that material within Great Britain. Such material shall be accompanied by a plant passport. Part 4 of the Order imposes a requirement on forestry traders to be registered and enables the Forestry Commissioners to authorize such traders to issue plant passports. Other provisions of these Regulations contain special arrangements governing trade in relevant material between Great Britain and Switzerland, give general enforcement powers to inspectors, provide for exemptions to be granted by the Forestry Commissioners, require the notification of plant pests and diseases and prescribe offences.