Article 33
For the purpose of seeking improved alternatives to certain provisions set out in this Directive, it may be decided to organise temporary experiments under specified conditions at Community level in accordance with the provisions referred to in Article 46(2).
In the framework of such experiments, Member States may be released from certain obligations laid down in this Directive. The extent of that release shall be defined with reference to the provisions to which it applies. The duration of an experiment shall not exceed seven years.