Rule 18-21.001, F.A.C., sets out the intent of rule Chapter 18-21, F.A.C., repeating the Board of Trustees’ role as fiduciary to manage and control state lands. This text duplicates Sections 253.03 and 253.12, F.S., and is therefore unnecessary. Rules 18-21.0405 and 18-21.0081, F.A.C., set out the program to register existing structures on sovereign submerged lands under the Grandfather Structure Registration program. Registration originally ended June 30, 1984, and was extended to April 1, 1991. All registered structures were required to obtain a lease by January 1, 1998. The program has ended. As a result, the rules are now unnecessary. OTHER RULES INCORPORATING THIS RULE: There are no other chapters or rules that incorporate the rules proposed for repeal. EFFECT ON THOSE OTHER RULES: These rules are not incorporated by other chapters or rules; therefore, there will be no effect on other rules.