Some systems are still eligible under the "fourth subsequent notice program of the Cox v. Shell polybutylene plumbing class action settlement".
New TV commercials just came out and the pbpipe.com site is all new.
The site main page says "The leak deadline for mobile home and yard service claims expired 7/31/2005", but it mentions yard service lines being eligible in some cases on other pages of the site.
Also PB2110 M type is not eligible.
Here is the "eligibility page"
Eligibility
The NC verbiage comes up short by not disclosing the fact that higher chlorine levels have been found to deteriorate the PB pipe from the inside out. Realtors are on the NC Home Inspector Board.
I found PB pipe with plastic fittings in a plumbers house once, he also had the water pressure set very low. He also had his crew replace all of it for my client the next week.