4. Before an obliged entity outsources a task pursuant to paragraph 1, it shall assure itself that the service provider is sufficiently qualified to carry out the tasks to be outsourced.
Where an obliged entity outsources a task pursuant to paragraph 1, it shall ensure that the service provider, as well as any subsequent sub-outsourcing service provider, applies the policies and procedures adopted by the obliged entity. The conditions for the performance of such tasks shall be laid down in a written agreement between the obliged entity and the service provider. The obliged entity shall perform regular controls to ascertain the effective implementation of such policies and procedures by the service provider. The frequency of such controls shall be determined on the basis of the critical nature of the tasks outsourced.