I was able to find a little info. Basically, there was going to be legislation to PAY you (or get a credit) to scrap your older (15+ years) car, which was aimed at getting all those gas-guzzling, "unsafe" wrecks off the road. That means that wrecking yards could possibly scrap the ENTIRE YARD, which would mean no more parts cars, restorable cars, etc.
http://www.imcool.com/articles/politics/SEMA_Update_no_car_scrappage.htm
You could also be FORCED to scrap your older car
http://www.corvetteclubmi.com/legislation.htm
FYI, it's Section 832 of S. 517