External assurance plays a key role in enhancing trust and confidence in financial and non-financial reporting. With the goal of enhancing the trust and confidence investors, regulators and other stakeholders have in sustainability information, this standard will serve as a comprehensive, stand-alone standard suitable for any sustainability assurance engagements. It will apply to sustainability information reported across any sustainability topic and prepared under multiple frameworks. The standard is also profession agnostic, supporting its use by both professional accountant and non-accountant assurance practitioners.