Enforcement of the sentencing decision may be refused in the following cases:
1° The duration of the alternative penalty or probation measure is less than six months at the date of receipt of the certificate;
2° The conviction or decision is based on offences committed wholly, mainly or for the most part on the territory of the Republic or in a place treated as such;
3° The conviction relates to offences for which the convicted person has already been finally judged by the court of a State that is not a member of the European Union, provided that the sentence has been enforced, is being enforced or can no longer be enforced under the legislation of that State.