Originally posted by Demonic Phoenix
Nada. The Central 46 is, or rather, was the section of SS that handled the decisions and everything. General Yamamoto now takes care of the matters the Central 46 used to take care of, so he is, in essence, the Central 46.Basically, the Central 46 is the judicial system, and they are answerable to no one, bar the King perhaps, though as we both know, he's just a figurehead.
The Gotei 13 are a part of the Military of SS, along with the Kido Corps and the Stealth Corps (Onmi-something).
Then we have the 4 Noble Families. I don't know if they actually have a say in legal matters, though given their status, they probably do.Captains are usually allowed to act on their own discretion so long as they abide by the laws set by the Central 46, but legal matters and (major?) decisions such as executions or treason, are left to the Central 46. I don't think Captains are allowed to take these decisions into their own hands. The Gotei 13 never went after Rukia until AFTER the decision was passed by C46/Aizen.
So now that I've enlightened you on how SS works 😛 (well, this is just how I view it, there might be a few errors here and there), let's get back to the matter at hand.
Aizen killed the Central 46 and thus 'became' the Central 46. There was no judiciary system after Aizen revealed himself. However, the absence of the C46 does not give the Captains the right to take the law into their own hands imo. They should know that much. Without an official order to execute Aizen, they could not do so, regardless of whether the C46 existed or not.
Yuroichi was a former captain, and she was on the side of the Shinigami. The best she could do would be to try and take Aizen as a prisoner. If she or Soifon had executed him right there and then, it would have been for the better (in hindsight), but it would have been viewed as an act of treason by the next Judicial System.
While I agree that the Central 46 (lol, that's the number) were the leaders, without the central 46, we are left with only the military arm to lead. I see no evidence for Yoruchi and Soifon being commanded by Yamamoto to stand down or even imply that he would do such a thing (in fact, it can be soundly reasoned that he would have commanded it had they not surrounded him because he was going to kill Ukitake and Shunsui for their "treason"..his tow most prized students that were pratcially sons to him), nor is there in reason why they should not have executed him on the spot ESPECIALLY since they were part of the assassination squad (which has the role of being the detention squad/prison peeps/etc.)
There's also the fact that Aizen admitted to everthing, there was evidence proving that, and the fact that Aizen had comitted multiple forms of treason. He broke just about every single established law from the Central 46. There is aboslutely not doubt, at all, that he should have been executed. The fact that Yamamoto did NOT say don't kill him when they had their blades to Aizen should soundly confirm that Aizen was ripe and ready for some death.