aspect of relevance, based on the size, or magnitude, or both," of the items to which financial information relates. The IASB has declined to specify a uniform quantitative threshold for materiality, or to predetermine what could be material in a particular situation, because of this entity-specific nature of materiality. On 31 October 2018, the International Accounting Standards Board amended the definition of materiality in IFRS Standards by amending IAS 1 and IAS 8. The amended definition of materiality is effective from 1 January 2020: The concept of materiality in accounting is strongly correlated with the concept of Stakeholder Engagement. The main guidelines on the preparation of non-financial statements (GRI Standards and IIRC <IR> Framework) underline the centrality of the principle of materiality and the involvement of stakeholders in this process. Materiality in auditing The International Auditing and Assurance Standards Board (IAASB) is an independent standard-setting body that serves the public interest by setting high-quality international standards for auditing, assurance, and other related standards. The IAASB issues the International Standards on Auditing, which consists of a growing number of individual standards. In terms of ISA 200, the purpose of an audit is to enhance the degree of confidence of intended users in the financial statements. The auditor expresses an opinion on whether the financial statements are prepared, in all material respects, in accordance with an applicable financial reporting framework, such as IFRS. ISA 320, paragraph A3, states that this assessment of what is material is a matter of professional judgement. The concept of materiality is applied by the auditor both in planning and performing the audit, and in evaluating the effect of identified misstatements on the audit and of uncorrected misstatements, if any, on the financial statements and in forming the opinion in the auditor’s report. ISA 320, paragraph 10, requires that "planning materiality" be set prior to the commencement of detailed testing. ISA 320, paragraph 12 requires that materiality be revised as the audit progresses, if (and only if) information is revealed that, if known at the onset of the audit, would have caused the auditor to set a lower materiality. In practice, materiality is re-assessed at least once, during the conclusion of the audit, prior to the issuing of the audit report. This materiality is referred to as "final materiality". ISA 320, paragraph 11, requires the auditor to set "performance materiality". ISA 320, paragraph 9, defines performance materiality as