(54)In order to address the potentially detrimental effect of poorly designed corporate governance arrangements on the sound management of risk, Member States should introduce principles and standards to ensure effective oversight by the management body, promote a sound risk culture at all levels of credit institutions and investment firms and enable competent authorities to monitor the adequacy of internal governance arrangements. Those principles and standards should apply taking into account the nature, scale and complexity of institutions' activities. Member States should be able to impose corporate governance principles and standards additional to those required by this Directive.