21.—(1) Where any employed persons have in the course of their employment reasonable opportunities for sitting without detriment to their work or where a substantial proportion of any work done by employed persons can properly be done sitting, there shall be provided and maintained for their use suitable facilities for sitting.
(2) The Minister may, by regulations, prescribe a standard of suitable facilities for sitting for offices or any class or description of office or parts thereof, or for any particular kind of work.
