5.—(1) The landing in Great Britain of the following tree pests and relevant material is prohibited—
(a)any tree pest of a description specified in Schedule 1;
(b)any relevant material of a description specified in column 2 of Schedule 2 carrying or infected with a tree pest of a description specified in column 3 of that Schedule opposite the reference to that relevant material;
(c)any tree pest which, although not specified in Schedule 1 or in column 3 of Schedule 2, is not normally present in Great Britain and which is likely to be injurious to trees in Great Britain;
(d)subject to paragraph (2), any relevant material of a description specified in column 2 of Schedule 3 which originates in a third country specified in column 3 opposite the reference to that relevant material;
(e)subject to article 8, any relevant material not prohibited under sub-paragraph (d) which is of a description specified in column 2 of Part A of Schedule 4, unless the requirements specified in column 3 of that Part opposite the reference to that relevant material have been complied with; and
(f)subject to article 8 and without prejudice to any requirements specified in column 3 of Part A of Schedule 4 relating to the relevant material, any relevant material which is of a description specified in column 2 of Part C of Schedule 4 and which is not prohibited under sub-paragraph (d), unless the requirements specified in column 3 of Part C of Schedule 4 opposite the reference to that relevant material have been complied with.
(2) The prohibition in paragraph (1)(d) shall not apply to any relevant material which is in the course of its consignment between two third countries under appropriate customs procedures and without any change in customs status and which is transported in such a way as to prevent the accidental escape of tree pests.