(a) Public services or bodies of the State in which such operations take place; (b) Public services or bodies of the State of employment on the basis of agreement between the States concerned; (c) ment. A body established by virtue of a bilateral or multilateral agree- 2. Subject to any authorization, approval and supervision by the public authorities of the States Parties concerned as may be established pursuant to the legislation and practice of those States, agencies, prospective employers or persons acting on their behalf may also be permitted to undertake the said operations. Article 67 1. States Parties concerned shall cooperate as appropriate in the adoption of measures regarding the orderly return of migrant workers and members of their families to the State of origin when they decide to return or their authorization of residence or employment expires or when they are in the State of employment in an irregular situation. 2. Concerning migrant workers and members of their families in a regular situation, States Parties concerned shall cooperate as appropriate, on terms agreed upon by those States, with a view to promoting adequate economic conditions for their resettlement and to facilitating their durable social and cultural reintegration in the State of origin. Article 68 1. States Parties, including States of transit, shall collaborate with a view to preventing and eliminating illegal or clandestine movements and employment of migrant workers in an irregular situation. The measures to be taken to this end within the jurisdiction of each State concerned shall include: (a) Appropriate measures against the dissemination of misleading information relating to emigration and immigration; (b) Measures to detect and eradicate illegal or clandestine movements of migrant workers and members of their families and to impose 135