MC Put in AERT let tool designers decide. However, need to say how many potential false positives exist. They are using horizontal tabs at top. They started adding new tabs for each new section of their site and recently simplified. In terms of existing structures, list is nice.
Headings are pieces of title.
Nothing that says what it is a heading of. You can have classes of headings and accessing what that class means. Discussion on WCAG about styles and class. LK Additional conversation. Not obvious place in conversation.