The provisions of this Regulation respect the principle of proportionality, having regard in particular to the diversity in size and scale of operations and to the range of activities of institutions. Respect for the principle of proportionality also means that the simplest possible rating procedures, even in the Internal Ratings Based Approach (‧IRB Approach‧), are recognised for retail exposures. Member States should ensure that the requirements laid down in this Regulation apply in a manner proportionate to the nature, scale and complexity of the risks associated with an institution's business model and activities. The Commission should ensure that delegated and implementing acts, regulatory technical standards and implementing technical standards are consistent with the principle of proportionality, so as to guarantee that this Regulation is applied in a proportionate manner. EBA should therefore ensure that all regulatory and implementing technical standards are drafted in such a way that they are consistent with and uphold the principle of proportionality.