http://www.leg.state.fl.us/Statutes/index.cfm?App_mode=Displ...
My guess it might be similar to rotary dryer - the land under it costs more than lifetime of power your dryer will use.
P.S. if you have lots of small kids then at some point hanging out tons of small clothing becomes an exponential chore.
Lease agreements are a bit out of hand...especially in states with little/no renter protections.
Often it's to keep out the "wrong" sort -- don't want some uppity poor moving into your school district.
So small things like hanging your laundry to dry or hosting a lemonade stand will have the cops rolling up on your house.
(Yes, that's right -- I witnessed a township cop come destroy a child's lemonade stand signs, demand they disband, and threaten to cite the parents, and ultimately arrest the father within a week of living in an allegedly "upscale" neighborhood.)