Member States may take the necessary measures to ensure that the penalties referred to in Article 15 may be reduced if the offender:
(a)
renounces terrorist activity; and
(b)
provides the administrative or judicial authorities with information which they would not otherwise have been able to obtain, helping them to:
(i)
prevent or mitigate the effects of the offence;
(ii)
identify or bring to justice the other offenders;
(iii)
find evidence; or
(iv)
prevent further offences referred to in Articles 3 to 12 and 14.