At the pleasure of the President
Remember what I've been telling everyone for a long time now. For Democratic politicians issues like health care are not about providing health care for people. It's about gaining power for the State.
The "waivers" for corporations making the news today are not a failure of Obamacare. They are a success, in that the arbitrary blessing of the State is now required for the system to function at all.
More here.
^This kind of government by whim, and not by law, is the essence of the regulatory state. We are about to see a whole lot more of it - unless the health-care law enacted in March is repealed.^