These rules, cited as “Florida Rules of Appellate Procedure,” and abbreviated “Fla. R. App. P.,” shall take effect at 12:01 a.m. on March 1, 1978. They shall govern all proceedings commenced on or after that date in the supreme court, the district courts of appeal, and the circuit courts in the exercise of the jurisdiction described by rule 9.030(c); provided that any appellate proceeding commenced before March 1, 1978, shall continue to its conclusion in the court in which it is then pending in accordance with the Florida Appellate Rules, 1962 Amendment. These rules shall supersede all conflicting statutes and, as provided in Florida Rule of Judicial Administration 2.130, all conflicting rules of procedure.