(1) Nothing in this act shall be construed as in any manner impairing or affecting the right of parties to create additional rights, duties, and obligations in and by virtue of a rental agreement. The provisions of ss. 83.801-83.809 shall be in addition to all other rights allowed by law in a creditor-debtor or landlord-tenant relationship. (2) Chapter 82-151, Laws of Florida, shall apply to all rental agreements entered into, extended, or renewed after July 1, 1982.