I'm not sure are about states granting banks the right to create money. Do you have a source for this? As far as I can tell they do it simply because we all use them and trust them to keep the ledger. The state (meaning, the US or UK) doesn't seem to have much control over it.
The banks are obviously granted the limited right to create money by the government. Whether it's through regulation post facto or a charter a priori, by now virtually all modern states have a wide control over their banking systems, including setting required reserve rates.
> by now virtually all modern states have a wide control over their banking systems
This doesn't seem to be the case.
> including setting required reserve rates.
Can you find what the required reserve rate for the US and UK is? From what I can find the US does have a required rate but it's 0% and the UK doesn't have one at all.