There is a specific answer, Mr. Shipley: business casual, no jeans.
I would assume if we were travelling as an ad hoc committee, with actual tables set up and witnesses appearing and that type of thing, you'd probably be best to be in a suit and tie. But since we haven't structured anything as much as that, I would say business casual.
But there you are: we have a ruling on “no jeans”.
Mr. Stoffer.