10.—(1) The appropriate authority may by regulations modify Schedules 1 to 7 to the Plant Health Regulations where the modification is—
(a)necessary or appropriate in the light of developments in scientific or technical knowledge; or
(b)technically justified and consistent with the risk to plant health.
(2) Regulations under paragraph (1) may, among other things, add, vary or omit an entry in Schedules 1 to 7 to the Plant Health Regulations.