13.—(1) Before placing pressure equipment or an assembly on the market, a manufacturer must—
(a)ensure that it bears a type, batch or serial number or other element allowing its identification; and
(b)ensure that it is marked with—
(i)the name, registered trade name or registered trade mark of the manufacturer; and
(ii)a single postal address at which the manufacturer can be contacted.
(2) Where it is not possible for information specified in paragraph (1)(a) and (b) to be indicated on the pressure equipment or assembly, the manufacturer must ensure that the information is indicated on its packaging or in a document accompanying the pressure equipment or assembly.
(3) The details set out in paragraph (1)(b) must be in a language which can be easily understood by consumers, other users and market surveillance authorities in the member State in which it is to be made available to such users.