11.—(1) Subject to paragraph (2), every non-automatic weighing machine shall be fitted with an adjustable levelling device or devices and one or more level indicating devices to cover all directions.
(2) Nothing in paragraph (1) shall apply to a machine which is permanently installed, freely suspended, or is a Class II, Class III or Class IIII machine which meets the requirements of paragraph 16 in Part III of Schedule 2 in relation to machines without level indicating devices.