It doesn’t matter if it was passed before or after RCID charter was passed. Both are covered here:
Florida Statutes, and amendments thereto, shall not be applicable to the Reedy Creek Improvement District. In the event of a conflict between the provisions of this Act and the provisions of any other law, now existing or hereafter enacted, the provisions of this Act shall control to the extent of any such conflict unless such enactment shall specifically repeal or
amend the provisions of this Act.
So if RCID notification requirements conflict with another statute (existing or hereafter enacted), the RCID statute controls unless the other statute repealed or amended the RCID act.
From what Len posted earlier the RCID charter did not require notice. From the original RCID charter:
(d) To provide for the manner in which such comprehensive general plans, codes, regulations and restrictions shall be determined, established and enforced, and from time to time amended, supplemented, changed or repealed, with or without notice and public hearing, as the Board of Supervisors may