To be honest currently due to the differences in legal system it has the same basic rules as the rest of the UK but the CAA is pretty much bollockless up north for your private pilot currently.
The commercial operators will stay with a UK AoC through the CAA. The machines will all stay G reg because you can chop a quarter off there value if they are anything other than EASA reg and part of an EASA maintenance program.
Everyone's licenses are through the UK CAA so unless you change them to Scottish ones you still have to abide by the same rules.
G-reg you have to comply with the most restrictive rules of either the state of reg or the airspace. So again nothing changed.
So basically nothing will have changed even if Scotland does have its own ANO. It will be the same as Jersey and Guernsey. Who both have there own ANO but very few have a clue what it says.
Its not actually a small task, the GA side of things will be pretty simple.
Loganair is about the only fixed wing commercial.
The rotary side of things will be a bit of nightmare.
Anyway its not worth really discussing. We will just get one of the independence lot assigned to spout their pish on yet another thread.
Lets just wait and see what happens, its going to be a complete cluster
which ever way it goes.