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The High Contracting Parties undertake to communicate to each other in regard to any person of either sex who has committed or attempted to commit any of the offences referred to in the present Convention or in the Conventions of 1910 and 1921 on the Suppression of the Traffic in Women and Children, the various constituent acts of which were, or were to have been, accomplished in different countries, the following information (or similar information which it may be possible to supply under the laws and regulations of the country concerned):
(a) Records of convictions, together with any useful and available information with regard to the offender, such as his civil status, description, finger-prints, photograph and police record, his methods of operation, etc.
(b) Particulars of any measures of refusal of admission or of expulsion which may have been applied to him.
These documents and information shall be sent direct and without delay to the authorities of the countries concerned in each particular case by the authorities named in Article 1 of the Agreement concluded in Paris on May 18th, 1904, and, if possible, in all cases when the offence, conviction, refusal of admission or expulsion has been duly established.