The document outlines the requirements of SMO 1 (Quality Assurance) for IFAC member bodies. SMO 1 requires member bodies to establish a quality assurance review system that monitors firms performing audit, review, and other assurance services on financial statements. The system should operate at the engagement, firm, and oversight levels. The scope of the quality assurance review system must include audits of financial statements, with priority given to statutory audits and those of public interest entities. Other engagements should be included if they meet published criteria related to stakeholders, public interest, or legal requirements. Member bodies may have direct responsibility, no responsibility, or shared responsibility for their quality assurance review system depending on their jurisdiction.