I don't know when you come up for review but I would definitely try to get another job before anything might affect you and then give the reason in your termination letter, copy to the board president (not to be "mean" but to inform him -- I would also state in my letter that I did not confront my boss because there are no checks and balances in place to protect you and they might want to figure out how to put some of those in?).

I would also start a work "diary"/journal of projects assigned, when they are assigned, etc. so if you cannot find another job you can at least protect yourself in writing; it's like winning/losing at the race track, you have to have a written record to claim it with the IRS, can't just verbally lie like your boss did.

If you cannot find another job, then when an issue comes up you can expose the whole thing along with your work journal and see where the chips fall, but only if you have no other option.