Artikel 1

1. The Contracting Parties undertake to grant each other in the circumstances set out below the mutual assistance necessary for the social rehabilitation of the offenders referred to in Article 2. This assistance shall take the form of supervision designed to facilitate the good conduct and readaptation to social life of such offenders and to keep a watch on their behaviour with a view, should it become necessary, either to pronouncing sentence on them or to enforcing a sentence already pronounced.
2. The Contracting Parties shall, in the circumstances set out below and in accordance with the following provisions, enforce such detention order or other penalty involving deprivation of liberty as may have been passed on the offender, application of which has been suspended.