Assuming the feds don't change on their end, what's stopping Florida from joining Atlantic Time (and declining D.S.T.)? I looked at 15 USC 261-264 which define

Assuming the feds don't change on their end, what's stopping Florida from joining Atlantic Time (and declining D.S.T.)? I looked at 15 USC 261-264 which defines the time zones, but except for some exceptions about Idaho and Texas/Oklahoma, I don't see anything that specifies which zone each state needs to be in (or other geographical specifications)