No, in that document, personal watercraft seem to be only jetskis as the comments about them all seem to imply that. I think windsurfers 'might' fit into the non-powered vessel category.
"wind, surfers" are mentioned in the text, as well as kitesurfers.
I didn't read it completely, but it describes kitesurfers as needing to learn the right-of-way rules.
I don't know if it really makes any distinctions for windsurfing, other than suggesting that it or kitesurfing are popular in some spots.
Huge sweeping statements!
"A large number of kitesurfers are operating in the vicinity of small sailing craft. Kitesurfers become caught in powerlines and trees. These users need to be separated by zoning given both types of craft are difficult to handle, particularly on windy days."
or
"Develop an education package, aimed at kitesurfers, which explains rights-of-way and promotes courtesy towards other users."
Clearly Kiters/Windsurfers are not sailing in a harmonious way within Botany Bay. Apart from a few drop ins, I haven't found kiters to be bad around the reef breaks of the Northern Beaches or at Wanda. Maybe it's a learner/beginner issue.