Cooperation between institutions
Article 20
1. The relevant institutions shall communicate to the competent institution of the Member State whose legislation is applicable to a person pursuant to Title II of the basic Regulation the necessary information required to establish the date on which that legislation becomes applicable and the contributions which that person and his employer(s) are liable to pay under that legislation. 2. The competent institution of the Member State whose legislation becomes applicable to a person pursuant to Title II of the basic Regulation shall make the information indicating the date on which the application of that legislation takes effect available to the institution designated by the competent authority of the Member State to whose legislation that person was last subject.