City of Jacksonville issued the following announcement on Dec. 17.
The Jacksonville City Council at its regular meeting of Monday, December 14th, 2020 passed and approved an Ordinance Amending the Jacksonville Municipal Code, Chapter 2 Administration, Article IX. - Health, Adding New Section 2-260 Declaration Of Health Emergency By Mayor And Public Health Requirement To Wear Masks In Public Spaces.
The City Ordinance is highlighted below in its entirety.
Original source can be found here.