5.—(1) Any person who–
(a)designs for another any pressure system or any article which is intended to be a component part thereof; or
(b)supplies (whether as manufacturer, importer or in any other capacity) any pressure system or any such article, shall provide sufficient written information concerning its design, construction, examination, operation and maintenance as may reasonably foreseeably be needed to enable the provisions of these Regulations to be complied with.
(2) The employer of a person who modifies or repairs any pressure system shall provide sufficient written information concerning the modification or repair as may reasonably foreseeably be needed to enable the provisions of these Regulations to be complied with.
(3) The information referred to in paragraph (1) shall–
(a)in the case of paragraph (1)(a), be provided with the design;
(b)in the case of paragraph (1)(b), be provided with the pressure system or article when it is supplied by that person;
(c)in the case of paragraph (2), be provided to the user of the system immediately after the modification or repair.
(4) Any person who manufactures a pressure vessel shall ensure that before it is supplied by him the information specified in Schedule 3 is marked on the vessel, or on a plate attached to it, in a visible, legible and indelible form; and no person shall import a pressure vessel unless it is so marked.
(5) No person shall remove from a pressure vessel any mark or plate containing any of the information specified in Schedule 3.
(6) No person shall falsify any mark on a pressure system, or on a plate attached to it, relating to its design, construction, test or operation.