For content that has gone under a stringent certification review process having this information displayed on the initial Accessibility Page is important to promote the discover of certified accessible material, instead of having this information buried in the "additional accessibility information".

3rd party certification like LIA and Benetech's GCA (Global Certified Accessible) program have been around for years and is a recognized and trusted to ensure accessibility.

In the section of Conformance if the title has a certifierCredential either the textual information or if applicable an image (logo/stamp) with alt text description of the certification be presented to the user in this section.