I see...moving to clause-by-clause, “provided that the bill is referred to committee on or before May 19”. Okay, that has happened.
Maybe what we actually need to do, instead of adding anything to (b)(iii), is simply change “Thursday, May 26” at the top of item (b) to “May 30”, and add whatever day of the week corresponds to that. That works for me. I think the intention is sufficiently clear.