Prescribed proportions of alcohol for replacement of specimens of breath
6. For the purposes of section 93F(2), the prescribed proportion of alcohol is—
(a)in the case of an offence under section 20(1)(a) of the Act in respect of a safety-critical duty, 50 microgrammes of alcohol in 100 millilitres of breath;
(b)in the case of an offence under section 20A(1) of the Act—
(i)in respect of a duty prescribed in regulation 4, 50 microgrammes of alcohol in 100 millilitres of breath;
(ii)in respect of a duty prescribed in regulation 5, 15 microgrammes of alcohol in 100 millilitres of breath;
(c)in the case of an offence under section 42 of the Act as respects which the corresponding offence under the law of England and Wales is an offence under section 78 or 79 of the Railways and Transport Safety Act 2003(1), 50 microgrammes of alcohol in 100 millilitres of breath;
(d)subject to regulation 6(e), in the case of an offence under section 42 of the Act as respects which the corresponding offence under the law of England and Wales is an offence under section 92 or 93 of the Railways and Transport Safety Act 2003, 15 microgrammes of alcohol in 100 millilitres of breath; and
(e)where the offence mentioned in regulation 6(d) is in relation to the aviation function specified in section 94(1)(h) of the Railways and Transport Safety Act 2003, 50 microgrammes of alcohol in 100 millilitres of breath.