Pittsburgh Zoning Board Vs. The Steelers
"The Pittsburgh Zoning Board of Adjustment ruled that the Coca-Cola lettering cannot be added to the Great Hall signs and banners at Heinz Field. The Steelers had sold naming rights for the Great Hall to Coke under a 10-year deal. The board viewed the Coca-Cola signs not as identification but rather as advertising, which isn't allowed in that section of the North Shore."
Thanks to Governing.com