The EBA published on 12 October 2017 an Opinion on Brexit to ensure the consistent application of Union legislation to businesses seeking to establish or enhance their EU27 presence in order to retain access to the EU Single Market. The Opinion aims at providing greater certainty to firms and ultimately at ensuring a level playing field. In the Opinion, the EBA addresses a number of relevant policy topics relating to authorisations, the prudential regulation and supervision of investment firms, internal models, outsourcing, internal governance, risk transfers via back-to-back and intragroup operations, and resolution and deposit guarantee scheme issues. The EBA will monitor how the Opinion will be applied in practice by authorities and will continue its policy and risk analysis work in relation to the challenges posed by Brexit.