First I must note that I'm no expert in this field. So most of what I write is sourced from the German Wiki Aventurica. Corrections are very welcome.
Morgoth wrote:Aside from that, what is the background/deal of Qabalya Mages?
The Tradition of the Qabalya mages stems from the tulamid region (mainly Arania) shortly after the mage wars around 595 FB. After those wars the mage guilds had an ill reputation there. And when two major academies (Baburin and Elburum) were closed in 598 FB, the mages formed secret societies to practice their (now forbidden) craft.
edit: The video game “Memoria” by Deadalic Entertainment that's also available in English also briefly covers those mage wars though it doesn't go into qabalya mages.
Morgoth wrote:-Do Qabalya Mage's have Seals (tattoos) on their palms or otherwise like Guild Mages?
No, that would go strongly against the whole “secret organisation” theme I mentioned above. The main purpose of the seal is to identify you as a guild mage—granting you the privileges that come with it (thanks to the Codex Albyricus). As someone that tries to hide his identity as a mage, the use of a seal would obviously be a no-go.
Morgoth wrote:Do they follow the Codex Albericus?
Considering that the Codex Albyricus requires them to identify as mages (wearing seal and codex-conforming robes), that would also go against their tradition of secrecy. Sure those guild rights are nice to have for a mage, but I'd take qabalya mages as most conservative when it comes to their ways and traditions.
I think for the purposes of the Codex Albyricus, they would count as guildless mages, meaning they're forbidden to sell their magic for coin. But who cares, right?
Morgoth wrote:what is the view of the Guilds on them?
They were born out of a situation that doesn't exist anymore. Personally, I don't think there many qabalya mages left. So why should the Guilds pay much attention to them?
Morgoth wrote:Say, if a White Mage of the Gareth Academy comes across a Qabalya Mage is he to arrest him or attack him on sight, as white mages are supposed to be more strict about the laws of the guild.
Ad primo, the white mage would need to care. While that might sound like the easiest part, I don't think many mages would have the motivation to go and look for illegaly operating magic users and report them to the local authorities (who might or might not care). There sure would be some branches of the church of praios interested in that kind of activity but I'd wager that many white mages would still prefer to spend their valueable time doing research in one of the academies.
Ad secundo, the white mage would need to identify the qabalya mage as such. As a tradition that specializes in preventing its detection this should be quite hard.
Ad tertio, the white mage would need to catch the qabalya mage illegaly offering magical services or commiting a magical crime. He would then have to convince the local authority to persecute against the offender. He isn't allowed to take justice into his own hands. If a white mage is caught casting offensive magic without provocation they will be sent to their guild court which has much harsher punishments than the local court (that the guildless mage would be tried at).