(8)The principles of mutual recognition and of home Member State supervision require that the Member States' competent authorities should not grant or should withdraw authorisation where factors, such as the content of programmes of operations, the geographical distribution or the activities actually carried on indicate clearly that a management company has opted for the legal system of one Member State for the purpose of evading the stricter standards in force in another Member State within the territory of which it intends to carry on or does carry on the greater part of its activities. For the purpose of this Directive, a management company should be authorised in the Member State in which it has its registered office. In accordance with the principle of the home country control, only the Member State in which the management company has its registered office can be considered competent to approve the fund rules of unit trusts/common funds set up by such a company and the choice of the depositary. In order to prevent supervisory arbitrage and to promote confidence in the effectiveness of supervision by the home Member State authorities, a requirement for authorisation of a UCITS should be that it should not be prevented in any legal way from being marketed in its home Member State. This does not affect the free decision, once the UCITS has been authorised, to choose the Member State(s) where the units of the UCITS are to be marketed in accordance with this Directive.