They are not prohibited by the SCCA as they are by SCORE.
Marshall, if you don't have a rule book, you can download it from my website...
<A target="_blank" HREF=http://www.timthedriver.com/2002PerformanceRallyRuleBook.pdf>Here's the Link</A>. Just right click and select "Save Target As" You'll then have the whole book on your harddrive. It's just under 1 Meg. Shouldn't take that long, even on a dial up.
Happy motoring, Tim