Article 95 2.

communication of relevant information could adversely affect the security of the Member State addressed, in particular with regard to the fight against terrorism and other serious crimes;

where complying with the request is likely to adversely affect its own investigation, enforcement activities or, where applicable, a criminal investigation;

where proceedings have already been initiated in respect of the same actions and against the same natural or legal persons before the courts of the Member State addressed;

where a final judgment has already been delivered in respect of the same action and against the same natural or legal person in the Member State addressed.