Why was the issuance of International Standard on Auditing 13 (ISA 13) considered so important to harmonization of auditing standards?

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The issuance of ISA 13 was considered important because it provided guidance on the form and content of the audit report, which helped to harmonize auditing standards internationally. It did not require all multinational corporations to adopt international auditing standards by 2008 and did not specify the form and content of the annual report. While it does require the auditor to express an opinion on whether the statements give a true and fair view of corporate performance, this is not the main reason for its importance in harmonizing auditing standards.

Why Was the Issuance of International Standard on Auditing 13