I don't know.
I found the Washington Post article from Dec 11, 2004 it's at: http://www.washingtonpost.com/wp-dyn/articles/A56171-2004Dec10.html A different article says that Rockefeller made his statements on the floor of the Senate. It doesn't say where the others made their comments. Rockefeller's office claims everything he said was vetted and approved before he made the statements. The other article in the American Spectator says that they weren't The American Spectator article of 12/16/04 is at:http://www.spectator.org/dsp_article.asp?art_id=7519
Supposedly Rockefeller's comments on the floor were:
""My decision to take this somewhat unprecedented action is based solely on my strenuous objection -- shared by many in our committee -- to a particular major funding acquisition program that I believe is totally unjustified and very wasteful and dangerous to national security," Rockefeller said. "Because of the highly classified nature of the programs contained in the national intelligence budget, I cannot talk about them on the floor."
Rockefeller added that the committee has voted "to terminate the program" for the past two years "only to be overruled" by the appropriations committees. "
Even discussing the existance of a black program is a no no but I doubt that if this is all he said that anyone would prosecute him for this. I don't know what the others had to say. They all refused to sign the conference report. It looks like the others made similar statements at least in public. Who the heck knows what they said to reporters in private. There doesn't seem to be much info