13.—(1) Every employer who undertakes work which exposes his employees to asbestos shall ensure that the premises or those parts of premises where that work is carried out and the plant used in connection with that work are kept in a clean state and, in particular, where work with asbestos has been completed the premises or those parts of the premises where the work was carried out are thoroughly cleaned.
(2) Subject to paragraph (3), where a manufacturing process which gives rise to asbestos dust is carried out in a building, the employer shall ensure that any part of the building in which the process is carried out is—
(a)so designed and constructed as to facilitate cleaning; and
(b)is equipped with an adequate and suitable vacuum cleaning system which shall, where reasonably practicable, be a fixed system.
(3) Paragraph (2)(a) shall not apply to any building in which, immediately before the coming into force of these Regulations, there was carried out a process to which either—
(a)prior to its revocation regulation 13 of the Asbestos Regulations 1969 applied and the process was carried out in compliance with that regulation; or
(b)that regulation did not apply.