Article 157
Collaboration concerning supervision
The competent authorities of the Member States concerned shall collaborate closely in order to supervise the activities of institutions operating, in particular through a branch, in one or more Member States other than that in which their head offices are situated. They shall supply one another with all information concerning the management and ownership of such institutions that is likely to facilitate their supervision and the examination of the conditions for their authorisation, and all information likely to facilitate the monitoring of such institutions, in particular with regard to liquidity, solvency, deposit guarantees, the limiting of large exposures, administrative and accounting procedures and internal control mechanisms.