Internet Gambling in the US and the need for clarification

U.S. legislation' ban on online gambling is so unclear that it's not easy to comprehend or implement.
That's the opinion of a federal officials responsible for carrying out the directive of the U.S. Congress regarding UIGEA (Unlawful Internet Gambling Enforcement Act of 2006).

The law it's not clear and open to interpretations. What exactly is intended to be unlawful Internet gambling?

In 2006, with little notice, the US Congress passed the ban by attaching the Bill to an unrelated port security bill without an open debate.

The law doesn't specify the definition of what constitute illegal online gambling. Professional poker players, financial institutions, and gaming enthusiasts are demanding for a change in the law, and a clear explanation of regulations and responsibility.

Because Internet gambling in the UK and in many other countries is legal, the European Union has started an investigation to evaluate if the restriction of online gaming in the UIGEA violate world trade regulations.