Jacksonville, where the Republican National Convention is slated to be held in August, is planning to institute a city-wide mask order to stem the spread of coronavirus, city hall sources tell POLITICO.

The announcement, scheduled for noon, requires indoor-mask wearing only — not an outside mandate that other local governments in Florida have passed. Jacksonville is unlike any other municipality in the state because the sprawling city essentially encompasses all of Duval County in northeast Florida.

As the number of cases in in the city and state rise, Jacksonville Mayor Lenny Curry, his staff and healthcare experts have been discussing a mask order for more than a week, two sources said. A final turning point for Curry came after the decisions by the Coast Guard and Navy, which has two facilities in Jacksonville, to order indoor mask-wearing.