373.149 Existing districts preserved.—The enactment of this act shall not affect the existence of the Central and Southern Florida Flood Control District created by chapter 25270, 1949, Laws of Florida, or the Southwest Florida Water Management District, created by chapter 61-691, Laws of Florida, or any contract or obligation of such districts entered into prior to the effective date of this act. The two districts shall continue to exercise the taxing powers authorized to them in the territories within their respective boundaries, except that nothing herein shall limit the department in considering and recommending to the 1973 session of the Legislature changes in the boundaries and transfers of funds, appropriations, personnel, property, or equipment between or among the existing districts and districts created by this chapter. The two districts shall continue to exercise the powers presently authorized by chapter 378 and this chapter, notwithstanding provisions contained to the contrary in this chapter, until any such powers shall be specifically revoked or modified by the department pursuant to this chapter, except that the provisions of s. 373.139 relating to acquisition of real property shall apply.