Gambling is legally restricted, in some capacity or another in the United States, unless the state authorizes special regulatory entities to enforce or restrict different types of gaming at (usually) the local government or tribal level. Wikipedia says it best... Gambling in the United States. One huge caveat is online gambling - the Federal Wire Act of 1961 outlawed interstate wagering on sports, but it hasn't been modified to address the modern conveniences of the internet or virtual reality. The 'Unlawful Internet Gambling Enforcement Act of 2006' also didn't explicitly outlaw online gambling, however, it did outlaw financial transactions involving online gambling service providers.
All of this is moot though, as the Code of Conduct is one of the three explicit documents (ToS, CoC, Privacy Policy) which players MUST agree to if they want to log in and play. These are the 'rules of the house' aka the Homecoming servers.