http://online.wsj.com/article/SB10001424052702304177104577310050863533554.html "Among those set to implement the law, insurers would have to ditch changes to their businesses designed to bring in millions of new customers. Provisions that have already gone into effect, including letting children stay on their parents' insurance plans until they turn 26, would no longer be required.
Companies facing the law's requirements would be reprieved, including health firms set to pay new taxes and businesses that
would have been required to insure their employees or pay a fee."
Why "would have been required" instead of "would be required"? The mood of the paragraph is one of conjecture.