Researchers looking to locate either publisher, or funding agency policies can refer to Open Policy Finder, which is hosted by JISC. This resource pulls together the resources Sherpa Romeo & Sherpa Juliet, allowing users to search for both open access policies from journals/publishers, and open access mandates and requirements from funding agencies. This information can support authors in finding out whether they are under mandate, and how they can make their work open access under the constraints of publishers.
UNB Libraries' guide to the Tri-Agency Open Access Policy on Publications.
Adapted from the CAUL/CBUA Scholarly Communications Committee Digital Scholarship Toolbox Gitbook.