I’m going to build a levee but I reserve the right to blow it up when I see fit....would you sign right here?
Exactly. I'm from Louisiana, near the Morganza Floodway (on the east side of the Mississippi). If the Morganza Floodway is opened, the flood waters of the Mississippi will be diverted to the Atchafalya River and floodplain.
On the west side, past the Atchafalaya Rivier (but still in the Mississippi floodplain), lies the town of Simmesport, completely surrounded by levees. To the west of Simmesport is another levee. "If" the Morganza Floodway isn't enough to keep South Louisiana from flooding, the plan is to blow up that levee, and provide another path to the Atchafalya floodplain for the excess water.
Anybody who built/builds in that area is told up front that they have no recourse if it is necessary to blow that levee......."build at your own risk", but many have.
This appears to be a similar plan and law.