reg 52 Rules and conditions for affixing the UK marking and the M marking
(1) The UK marking and the M marking (“the markings”) must be affixed to a regulated measuring instrument in accordance with the provisions of this regulation. (2) The markings must be affixed visibly, legibly and indelibly to the regulated measuring instrument , its data plate, or where regulation 7(2) applies, to a label affixed to the regulated measuring instrument or to a document accompanying the regulated measuring instrument . (3) Paragraph (2) does not apply where it is not possible or not warranted on account of the nature of the regulated measuring instrument, in which case the markings must be affixed to the documents which accompany the regulated measuring instrument and any packaging. (4) When a regulated measuring instrument consists of a series of devices ..., operating together, the markings must be affixed on the instrument's main device. (5) The markings must be affixed before the regulated measuring instrument is placed on the market. (6) The markings may be affixed to the regulated measuring instrument during the fabrication process, if justified. (7) The M marking must immediately follow the UK marking. (8) The markings must immediately be followed by the identification number of the approved body where that body is involved in the production control phase as set out in Schedule 1B . (9) The identification number of the approved body referred to in paragraph (8) must— (a) be affixed by the body itself, or under its instructions by the manufacturer or his authorised representative; and (b) be indelible or self-destructive upon removal. (10) The markings and (where applicable) the identification number of the approved body may be followed by any other mark indicating a special risk or use.