When Corzine was in the senate, did he vote for Sarbanes/Oxley? I don't know if he was in the senate at that time. But I do know that according to the laws, "I don't know what happened" isn't a valid response to an inquiry, and some pretty harsh prison time can be handed down over this sort of thing... They have to "sign off" on compliance documents, and they're criminally responsible.
The only reason I know this is that since SOX was implemented where I work, things that used to take 5 minutes to do still take 5 minutes, but I also have to fill out paperwork for 10 - 15 minutes, and chase down the people who have to sign off on it.
An entire industry has sprung up around SOX compliance.
Mark