They are all in the NHRA and IHRA rule book that comes with your membership. Which specific one is unclear to you? There are some things hard to find or class dependant.

There are some generalized guidlines (tables) on various web sites for specific tracks. But again, class dependant, fuel/nitrous, etc.

Start at NHRA.com, and click on the "Competition" tab, then the various sub catagories,
"ET Quick Reference", "Licensing and Physical", "Buy a rule book", etc.

http://www.nhra.com/competition/etquickref.aspx