Fla. Stat. § 553.885:
CO detection devices are required in new commercial buildings where a portion thereof is used for sleeping purposes, including hospitals, hospice facilities, and nursing homes. (Effective date: July 1, 2007)

Fla. Stat. § 509.211:
Lodging Establishments: Every enclosed space or room that contains a boiler which is fired by the direct application of energy from the combustion of fuels and that is located in any portion of a public lodging establishment that also contains sleeping rooms shall be equipped with one or more carbon monoxide sensor devices.

2013 Florida Building Code, Residential

The International Residential Code requires new one- and two-family homes and townhomes (dwellings) of not more than three stories to install CO alarms in the general vicinity of each sleeping area. (Effective since adoption of 2009 IRC)