NBA commissioner Adam Silver has often predicted that sports gambling would become legal and had advocated that it become part of a regulated system. He has also called for the league to receive one percent of money facilities take in from betting on NBA games which would amount to about 20 percent of revenue.
Silver has referred to such a levee as "an integrity fee" and in February also called it a "royalty."
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"We created in our mind what a model bill should look like," he said.