Figure and Table lists – WGAC 2.4.5

Hello,

I’m trying to understand the DKB recommendations for including figure and table lists. Are they required for WCAG AA?

The summary reads:

Providing lists of key content, like tables, illustrations and video, allows readers to more easily return to these items later.”

But later, in the FAQs, it reads:

Should content lists be included in the EPUB navigation document?

Only if the navigation document is included in the spine.

Although these lists are an ideal for the navigation document, EPUB reading systems typically only provide access to the table of contents and sometimes the page list. This is true despite the EPUB specification requiring that there be some way to access all the content of the navigation document. Consequently, readers will not be able to access the lists when the navigation document is not in the spine.

So I’m trying to figure out: Does the book fail this criterion if the figure and table lists are present, but in a nav doc that isn’t in the spine? Is the recommendation (or requirement?) instead that the figure and table lists be visible, linked lists in the book’s TOC?

Thanks in advance!