I'm not an insurance type guy, just more of a Jail house lawyer!!! lol But to answer your question about proving they're doing what they promised. If an event of a claim and it can be proven the new concessionaire didn't do as promised his insurance could be declared null & void. That should be enough of a threat to insure the concessionaire does what he promised to do. In the case of SARL, it never was much of a boat lake. Irvine lake just had more boats and is much bigger so the odds of something happening were greater. As I stated earlier, "they been luckier then Irvine!!!!"