SailNaked:
I am trying to ask a serious question, ...Are the rules so inflexible that a tech instructor will refuse to train me because I do not have a dual bladder or dry suit? I said I would have a lift bag but I have no idea how that would help if I jumped off the back of a boat fully loaded with a failed bladder by the time I got it out and filled I would be near the bottom(assuming I was unable to swim it up, but if I can swim it up then like I said i would have time to use it).
You could ask one. The only course that I have heard that requires that is the PADI Tech courses.
The PADI/DSAT courses require 'two sources of buoyancy control'. It is recommended that these be either a single bladder wing and a drysuit, or a dual bladder wing. But, beyond that, there is instructor discretion. So, one answer to your original question is, 'No. A dual bladder wing or a drysuit is not specifically required.'
As to whether this is 'inflexible' or not, consider the context. The course sequence encourages redundancy (buoyancy control, lights, regulators, etc.) throughout, and emphasizes diver safety and thoughtful assessment of the risks involved, etc (notwithstanding the debate about use of air at 165'). I suspect most instructors would agree, that a situation where you needed redundant buoyancy is quite uncommon. But, it is not unheard of, and many divers are not able to swim double steel tanks to the surface from 150' (to pick a number). Personally, I would not take on a tech student who did not have a) a dual bladder wing (both inflators connected to a LPI hose, or b) a single bladder wing and a drysuiit (both inflators connected to a LPI hose), or c) two single bladder wings mounted to the backplate (both inflators connected to a LPI hose, NOT one connected and one available for oral inflation). I frankly don't want to accept the liability, associated with a one chance in a million (or less), that a student suffers injury or death because of a primary buoyancy failure. But, that is my approach (and, I even believe that you can quickly deploy a lift bag, with training and practice, to stop an uncontrolled negative descent). There are probably many experienced and capable instructors who would allow the use of a lift bag / SMB as a second 'source of buoyancy control', and possibly even some who would allow the addition of a certain amount of 'permanent positive buoyancy' to the rig as that second source. And, I think that a lift bag/SMB probably qualifies according to the PADI standard, but I have never called PADI to ask. I don't think the rules are inflexible. Certainly, I don't think that requiring 'two sources of buoyancy control' is inflexible. If you or anyone else does, though, that is your / their privilege. You are not required to train with a particular agency, or a particular instructor. You are free to choose what is best for you. An instructor is not required to accept you as a student if he/she believes that your gear, and/or approach to technical dive training, is unsafe.