101.4.7.1.2 Replacement equipment sizing (MANDATORY)
An AC contractor or licensed Florida PE shall submit a nationally recognized method based sizing calculation to the code official at the time of permit application for total replacement of the condensing and evaporator components of HVAC systems in accordance with Florida law and the provisions of Section 403.6.1 or Section S03.2.1, as applicable.
http://sumtercountyfl.gov/index.aspx?nid=126
http://www.cityofbonitaspringscd.org/