NAR - Model Rocket Safety Code

NAR - High Power Certification (Levels 1 and 2)

NAR - Level II High Power (J/K/L) Question Pool (pdf format)

NAR - High Power Certification Form Application (pdf format)

Tripoli Certification Information

Tripoli Motor Impulse Chart

ATF-Explosives Law and Regulations Index

FAA - FAR : PART 101
   TITLE 14 OF THE U.S. CODE OF FEDERAL REGULATIONS : 
    Chapters I and III : Federal Aviation Regulations :
          (MOORED BALLOONS, KITES, UNMANNED ROCKETS AND UNMANNED FREE BALLOONS)

Here is the 32 page Centuri Rocket Design Basics technical manual in Adobe  PDF format. It's chock full of Model Rocket basics, and is a good reference for any rocketeer. This is a large download, the file is appx. 2.5 MB in size, so download when you have the time. Click Here to download