Guitar tuning change for Rolling Stones Question

Sounds like this group is over my head but maybe someone can help
me. I am practicing "19th Nervous Breakdown" by the Rolling Stones
on the guitar but I've noticed that the guitar tuning has to be non-
standard. Can anyone tell me how to re-tune the guitar for this song?
I've heard that the Stones do use an alternative tuning and it
probably was used in many of their older hits. If I'm way out of
line with this group, let me know. Thanks for any help...

Bill Bau