4.In the case of pigs, if in a given slaughterhouse, the 45-minute time period between the sticking and the weighing of the carcasses cannot generally be observed, the competent authority of the Member State concerned may allow that the deduction of 2 % as referred to in Article 14(3):
(a)shall be reduced by 0,1 per cent units for every additional quarter of an hour or part thereof that has elapsed when the period between sticking and weighing exceeds the 45 minutes;
(b)can be increased by certain per cent units established by the Member State concerned when the period between sticking and weighing is shorter than 45 minutes. In this case the deduction shall be justified on the basis of scientific data.