How to make AP deny a client instead of using ACL?

[Anand S. Katti]

In the IEEE 802.11b standard there is a status code with value = 17 that
states "Association Denied because AP is unable to handle additional
associated stations."

Does the AP really denies the association  in the above case ?
if yes, then how to make the AP deny a client with above status code ?

Warm Regards,
Anand