Member States shall take the necessary measures to ensure that, in relation to the relevant criminal offences referred to in Articles 3 and 4, one or more of the following circumstances can, in accordance with national law, be regarded as a mitigating circumstance:
((a))
the offender provides the competent authorities with information they would not otherwise have been able to obtain, helping them to identify or bring to justice the other offenders;
((b))
the offender provides the competent authorities with information they would not otherwise have been able to obtain, helping them to find evidence.