The Bureau of Natural Resources, a U. S. government agency, put out a contract for 45,000 document copiers. It stipulated in the contract letter that preference would be given to a bidder for whom at least 51 percent of the materials by value in the copier were produced in the U. S. This contract provision is covered by the

David paid $975,000 for two beachfront lots in coastal south carolina, with the intention of building residential homes on each. two years later, the south carolina legislature passed the beachfront management act, barring any further development of the coast, including david's lots. when david files a complaint to seek compensation for his property, south carolina refuses, pointing to a passage in david's own complaint that states "the beachfront management act [was] properly and validly designed to south carolina's " is south carolina required to compensate david under the takings clause?