If the Oasis Beach Resort and Convention Center in Rosarito is in your vacation plans, it’s time for a change. The U.S. Treasury Department prohibits Americans from spending money at the popular hotel because it is purportedly a front for drug traffickers. As of Feb. 15, any American who spends money there could be fined as much as a million dollars. The hotel is on the coast below Tijuana, just 18 miles from the U.S. border.