Weren't the leashes added in Kunark when level requirements to engage were put in? I couldn't find any patch notes, aside from these two links. These are the only two patches I found containing Lady Vox.
Patch on June 22, 2000
http://everquest.allakhazam.com/hist...es-2000-1.html
Patch on October 08, 2009 states they added the leash to Vox.
http://eqplayers.station.sony.com/ga...ate=10/08/2009
If you go to
http://eqbeastiary.allakhazam.com/search.shtml?id=2620 and search the words "Method II" you will see that a post being made on 2005-01-05 claims that their second pull method works because Lady Vox is *not* tethered to her room.