If your principal asks you to sign a CEP and there was no collaboration or shared decision making by the team, you should refuse to do so.
Many schools did not create 2007-2008 CEP's.
According to a NY Daily News article on May 6, by Jess Wisloski, entitled "Parents groups playing hooky across the city", many school leadership teams are not functioning or only exist on paper.
Don't be part of a sham. You can refuse to sign the CEP and attach an explanation.