Here you will find links to rule sets.
aarcmcc is the Australian governing body, this is where the national rules for both off road and on road racing come from. Click the link to be taken to the web page and go to the download section to check out the speed control list for stock racing and all other technical rules for every class that we run in Australia.
www.mini-nats.com is a good place to start when looking at buying a Mini.
Victorian Formula1 page is simple a fantastic source of information for all things f1.