Disclamer: Assassin's Creed and all associated characters belong to Ubisoft.
Malik made sure to carefully readjust Altair's Codex to several changes. Those changes had to be done as the novice, in his ignorance, has forgotten to mention something of extreme importance for the continuous existence of the brotherhood. Malik recreated the whole hierarchy of the codex by adding just one, through often repeated, paraphrased and reiterated rule:
" No member of the Assassin's Order shall ever drink alcoholic beverages OF ANY KIND", after some consideration he decided to add "or other substances of similar effect".
Malik genuinely believed that the capitalisation was needed. After all one did not need The Apple and ability to see the future to figure out that allowing a bunch of inebriated men and women armed up to their teeth to run amuck in the city was NOT a good idea. Even if they were highly skilled in the art of wielding sharp and potentially deadly weapons. Especially if they were highly skilled in the art of wielding sharp and potentially deadly weapons.
He still had nightmares after that one time, when Altair got drunk and proceeded to run around the city with his skin painted black wearing only a white loincloth and a black cape with cat-ears like trinkets attached to its hood, screaming "Ijm e Betmen" on the top of his lungs. Until that day Malik never had realised that it was possible for him to pity the Templars. Come to think of it, he still had no idea why Kadar had blushed so profoundly every time someone had mentioned that incident. His brother and he were both in a group dispatched to deal with the wayward assassin, however Malik himself was not present as Kadar managed to subdue him, having fallen for one of earlier traps that Altair laid to slow down his pursuers. The fact that he had to share his tar pit with several feather-covered Templars only added an insult to an injury. So no. No alcohol for assassins.
Had Malik's revision survived, the future generations might have been spared many potentially damaging and positively humiliating situations.
A/N: in case anyone was wondering "Ijm e Betmen" is a poor phonetical transcription of "I'm a Batman". Any suggestions and constructive criticism are welcome.