(16)Whilst banks in Member States remaining outside the SSM are subject to supervision, resolution and financial backstop arrangements which are aligned at national level, banks in Member States participating in the SSM are subject to Union arrangements for supervision and national arrangements for resolution and financial backstops. Because supervision and resolution are at two different levels within the SSM, intervention and resolution in banks in the Member States participating in the SSM would not be as rapid, consistent and effective as in banks in the Member States outside of the SSM. Therefore, a centralised resolution mechanism for all banks operating in the Member States participating in the SSM is essential to guarantee a level playing field.