The Cash for Clunkers bill, a.k.a. the CARS program, is now active. If you're interested in trading up they've released the rules, all 136 pages of them, which we summarize for you below.

It's official, the Cash For Clunkers bill is now the law-of-the-land. For more information on how this bill works (or doesn't), check out our handy Cash For Clunkers Guide. [U.S. News, Getty Images]