Request for assistance by the competent authority of a Contracting State in the collection of a revenue claim shall include a certification by such authority that, under the laws of that State, the revenue claim has been finally determined. For the purposes of this Article, a revenue claim is finally determined when a Contracting State has the right under its internal law to collect the revenue claim and the taxpayer has no further rights to restrain collection.
Request for assistance by the. Competent Authority of a Contracting State in the collection of a revenue claim shall include:
