Directive 2011/61/EU of the European Parliament and of the Council ( 39 ) allows Member States to authorise alternative investment fund managers (AIFMs) to provide certain investment services in addition to the collective management of alternative investment funds (AIFs), including services of management of portfolios of investments, investment advice, safe-keeping and administration in relation to shares or units of collective investment undertakings, as well as reception and transmission of orders in relation to financial instruments. Since the requirements governing the provision of those services are harmonised within the Union, AIFMs authorised by their home competent authorities to provide those services should not be subject to any additional authorisation in host Member States nor to any other measure having the same effect.