But it was so long ago, nobody will remember what took place, who did what, what procedures existed and we've all learnt so much more since then. Everyone called to be a witness won't remember what happened and if they do find any paperwork, they'll have no recollection of it.
That's what they did at the Aust. Royal Commission.
The corporations that may be involved may also pass the buck onto the Government saying that it is their responsibility and if there were laws in place they would have complied by them.