In its conclusions on the future of return policy of 8 October 2015, the Council endorsed the initiative announced by the Commission to explore an extension of the scope and purpose of Eurodac to enable the use of data for return purposes. Member States should have the necessary tools at their disposal to be able to control illegal migration to the Union and to detect secondary movements within the Union and illegally staying third-country nationals and stateless persons in the Union. Therefore, the data in Eurodac should be available, subject to the conditions set out in this Regulation, for comparison by the Member States’ designated authorities.