5. Official surveys carried out pursuant to paragraph 1(f) must—
(a)include surveys for Bursaphelenchus xylophilus (Steiner et Buhrer) Nickle et al. on the plants, wood and bark to which Schedule 13 applies and its vectors in the genus Monochamus; and
(b)consist of the collection of samples of that material and those vectors in accordance with sound scientific and technical principles and the laboratory testing of those samples in accordance with EPPO PM 7/4.