Casinos are now required to adopt 'standard rules' for table games, and any changes only need approval from the agency's staff. Table game rules used to be set in regulations, but the commission repealed most of them earlier this year. Gordon Medenica, director of the Maryland Lottery and Gaming Control Agency, projects that the arrival of MGM - expected to draw many gamblers from Virginia across the Potomac River - will mean hundreds of millions of dollars more in state tax revenue in the casino's first full year.