Sec. 3. All exchanges of property, sales of property and conveyances thereof that may be made in the future by the City of Corpus Christi of property, within the area described in Section 1, that has been laid out and platted into lots, blocks or tracts for uses of private ownership as shown on a plat of the Bay Front Plan of said City of Corpus Christi, on file in the General Land Office of Texas and that may be necessary to adjust the titles and boundaries between the City and other owners are hereby authorized and said City of Corpus Christi is hereby empowered to make such exchanges, sales and conveyances; and all such property as may be so exchanged, sold and conveyed, is hereby confirmed, relinquished and granted unto the respective assigns of the City of Corpus Christi, and to their heirs, successors and assigns forever, without limitation as to use thereof to be made by them.