(16)In order to ensure effective supervisory oversight of the risks posed by inappropriate remuneration structures, the remuneration polices and practices adopted by credit institutions and investment firms should be included in the scope of supervisory review under Directive 2006/48/EC. In the course of that review, supervisors should assess whether those policies and practices are likely to encourage excessive risk-taking by the staff in question. In addition, CEBS should ensure the existence of guidelines for the assessment of the suitability of the persons who effectively direct the business of a credit institution.