As far as building permits go in this area, that is a difficult question to answer. Yes, they should have permits but you can either pay enough to get what you want or go ahead and build and pay someone if you get caught. Of course Moon Palace probably got caught in the middle on this one.
Laws protecting the mangroves have long been on the books but all the resorts have violated them with only minor sanctions. The new President, Felipe Calderon, pushed through tough new laws and it is apparent, he intends to enforce them. I am sure this comes as a huge surprise to Moon Palace and others!
The same is happening here on the island. Not only is Donald Trump wanting to build in a protected area on the east side of the island but one local agent is now advertising property for sale in this protected area on the internet. Of course, if anyone bought this land, they would be surprised to learn they can build nothing on the land!