The relevant bill hasn't, and I will my hat if it ever comes into existence and reaches the floor.
Same thing in the private sector. Nobody outside of regulated industries like pharma archived email, ever until Enron. Everyone didn't start doing it until the Federal courts changed the rules of civil procedure several years ago.
Again: my exact point was that the last thing anyone involved in this inquiry is going to do is actually pass specific legislation to address the actual problem, and mandate/authorize spending to do so. Instead we'll get calls for political bloodletting, for all the effectiveness of its name.
In reality, they will pass legislation, that will probably go way overboard and will budget 100 times more than is necessary in order to payoff some friend or group of friends (business as usual for Establishment Ds and Rs). Now mind you that the house will do this and because of the politics the Senate, led by the Majority Democrats, will promptly ignore it. Or they will pass it because it will benefit some friend of theirs and the President will sign it but decide to include a signing statement saying that they don't agree with any of it and that they will not implement it. Oh and they will put it as part of a large non-related omnibus package with a title talking about helping Homeowners Purchase Crop Dusters.