I assume you are speaking of the coding for level of funding, if not, I apologize. If so, than here is some information from the US Chamber of Commerce.
The Act [Pension Protection Act of 2006] </SPAN>creates new provisions for underfunded multiemployer plans and separates them into two broad categories: (1) plans between 65 percent and 80 percent funded are endangered "yellow zone" plans in immediate financial danger; and (2) plans that are less than 65 percent funded are critical "red zone" plans in need of reorganization.
Here is the link for more information
http://www.uschamber.com/issues/index/retirementpension/multiemployerplans.htm
From what I understand, CS is no where near being 80% funded. At the end of 2005, it was something on the order of 50% funded and more recent estimates (these are the most favorable estimates I have seen) put it at 63% (makeupsdeliver estimate which I think might be skewed to make CS look better) Just my opinion.