The NBA front office has fined Dallas Mavericks owner Mark Cuban for “public criticism and detrimental conduct” regarding officiating.

The league also sent out a memo to all of its teams reminding them of rules that govern conduct of owners, coaches and other team personnel during games.

The NBA also denied the Marvericks protest of their loss to the Hawks on February 22, where Cuban confronted the referees on court and on social media.

“It is a recognized part of sports for fans and the media at times to criticize officiating, but team executives must be held to a higher standard,” the NBA said in a statement.

“A team owner’s effort to influence refereeing decisions during and after a game creates the perception of an unfair competitive advantage and thereby undermines the integrity of the game.”

This is Cuban’s third fine of at least $500,000, once in 2002 and another in 2018.