reg 41 UK Marking
(1) The UK marking must be affixed visibly, legibly and indelibly— (a) to the product; (b) to its data plate; or (c) where paragraph (1A) applies, to— (i) a label affixed to the product; or (ii) a document accompanying the product. (1A) For a period of seven years beginning with IP completion day, the UK marking may be affixed to— (a) a label affixed to the product; or (b) a document accompanying the product. (2) Where paragraph (1A) does not apply and it is not possible or warranted, on account of the nature of the product, to affix the UK marking in accordance with paragraph (1)(a) or (b) , the UK marking must be affixed to— (a) the packaging, and (b) the accompanying documents. (3) The UK marking must be followed by the identification number of the approved body which carried out the relevant conformity assessment procedure for the product, where that body is involved in the production control phase. (4) The identification number of the approved body must be affixed— (a) by the approved body itself, or (b) under the instructions of the approved body , by the manufacturer or the authorised representative. (5) The UK marking and, where applicable, the identification number of the approved body must be followed by— (a) the specific marking of explosion protection as referred to in paragraph 5(1)(f) of Schedule 1, (b) the symbols of the equipment-group and category, and (c) where applicable, the other markings and information referred to in paragraph 5 of Schedule 1. (6) Products designed for a particular explosive atmosphere must be marked accordingly.