From @GreggVan on 1.4.13 Content on Hover or Focus:

In EN 301 549 and the INPUTS sub group we found the following SC to be somewhat ambiguous.

Where receiving and then removing pointer hover or keyboard focus triggers additional content to become visible and then hidden, the following are true:
Dismissible
...

(Emphasis added)

Are these options or are they all required?

After examination we found that they all addressed different issues and should all be required. And indeed the language says that — but not clearly.

We suggest the following editorial change be made in errata to make it clear.

Where receiving and then removing pointer hover or keyboard focus triggers additional content to become visible and then hidden, all of the following are true:

Thanks
Gregg