Here in Europe (different arrangements but same hotel brands) there are no formal government rates, but there are individual arrangements from each hotel with local commercial businesses. As far as I have experienced the various businesses who have these are always very keen that you book at these rates, as they get progressively better deals the next year depending on how many nights they do; 20% off standard up to 100 nights, 30% off 100 to 300 nights, etc. They want as many as possible, visiting employee relations, etc, and the hotels likewise.