The CoreTrustSeal Requirements describe the characteristics required to be a trustworthy repository for digital data and metadata. Each Requirement is accompanied by Guidance text describing the response statements and evidence that applicants must provide to enable an objective review. Applicants must respond to all of the Requirements. In addition to the full CoreTrustSeal Requirements text, which remains stable for the period 2023-2025, this document provides the Extended Guidance for CoreTrustSeal reviewers and applicants. Extended Guidance text is presented within a border and in blue within the document. This text may be updated during the 2023-2025 period.