The actuary should comply with national regulatory requirements, national and international actuarial standards, and national and, where applicable, international relevant professional guidance. Social security institutions should ensure that there is support for the actuary in this respect. Other professionals involved in actuarial work should also ensure compliance with relevant professional standards and guidance. Actuaries should use relevant methodology and assumptions to ensure that the social security institution complies with the relevant national and/or international accounting standards. In the case of conflicting regulatory requirements, national standards and/or international standards, the social security institution with the assistance of the actuary should develop a clear policy on the relative importance and application of the different sources of guidance, standards and/or regulations. Such policy may vary depending on the nature and purpose of actuarial work to be performed.