JM,
For one, the golf turf will never survive a cold turkey withdrawal from irrigation, if that's what the regulation ends up being. It will, however, survive a slow, managed withdrawal. The latter also will likely score points with regulatory agencies as far as them not hitting a panic button. If they don't see any activism in the turf industry, which seems to be spearheaded by golf courses, they may very well cave in to special interest groups, the bottled water industry, or whomever.
Joe