13. After regulation 15, insert the following regulation–
15A.—(1) Every employer who carries out any measurement of the concentration of asbestos fibres present in the air, whether or not in pursuance of regulation 15(1), shall ensure that he meets criteria equivalent to those set out in paragraphs 5.1, 5.2, 5.3, 5.4.1 and 5.4.2 of EN 45001.
(2) Every employer who requests a laboratory to carry out any measurement of the concentration of asbestos fibres present in the air, whether or not in pursuance of regulation 15(1), shall ensure that that laboratory is accredited by an appropriate body as complying with EN 45001.”.