I don't think you're correct, or you have made it clear. What you can say is that each organization or division has its own pre-approved technical stacks / frameworks / tools.
-mingyangli(Life is a journey);
2015-5-19{179}(#9458307@0)
There are typically three categories
a) what you can absolutely use
b) what you can absolutely NOT use
c) grey area. need to discuss and get approved on a case-by-case basis.