Sec. 4. IMPROVEMENT OF LAND;  TITLE TO LAND.  The City of Corpus Christi, its agents or assigns shall improve such portions of the land covered by said patent or any corrected patent as such city, its agents or assigns, deems suitable and proper therefor.  Such improvement shall consist of the raising or filling to a height of at least three (3) feet above the level of mean high tide, except for such part as may be devoted to channels, canals, or waterways.  Title to any portion of such land (except that devoted to channels, canals, or waterways) that has not been so improved by filling to such height before July 1, 1977, shall revert to the State of Texas, and from and after that date neither said city nor its assigns shall have any right, title, claim, or interest to such portion which has not been so improved.  No title shall revert, however, to the State of Texas as to any portion or portions which are filled to such height before July 1, 1977, including portions which are devoted to channels, canals, or waterways appurtenant to or used in connection with any portion so improved.
Sec. 5. POWERS OF CITY TO CONVEY OR RETAIN LAND;  OTHER POWERS.  Said city may retain all or any part of the land subject to this Act, and it may convey all or any part or parts of such land to others.  As to each tract or parcel of land which the city conveys to another or others, each such conveyance or conveyances shall:
(A) Contain a condition subsequent, which shall provide that such grantee or grantees shall by the date specified in the conveyance, which date shall in no event be later than July 1, 1977, improve the particular tract or parcel of land included in such conveyance to the extent that it will be filled to a height of at least three (3) feet above mean high tide, except for such portions thereof as may be devoted to channels, canals, or waterways.  If the date specified in the conveyance is a date prior to July 1, 1977, such condition subsequent shall provide that if said condition is breached, title to the tract or parcel of land covered by said conveyance that is not so improved (except for such portions as may be devoted to channels, canals, or waterways) shall revert to the City of Corpus Christi, and the right of reentry retained by said city in the conveyance shall be immediately exercised;  and said city may thereafter retain such portion or portions of such tract or parcel, or may convey such portion or portions in the same manner as provided above.  If the date specified in the conveyance is July 1, 1977, such condition subsequent shall provide if said condition is breached, title to such portion or portions of the tract or parcel of land covered by said conveyance that are not so improved (except for such portions as may be devoted to channels, canals, or waterways) shall revert to the State of Texas;
(B) Provide that such portion or portions of the tract or parcel of land covered by the conveyance which have been so improved, including such portions thereof as may be devoted to channels, canals, or waterways appurtenant to or used in connection with any portion so improved, shall, upon the written application to the City of Corpus Christi describing the improved area and the area devoted to channels, canals, or waterways appurtenant or used in connection therewith, be by the city by ordinance or resolution released of the condition subsequent and a proper recordable release shall be executed and delivered.  Any such ordinance or resolution of said city shall be binding upon all parties concerned, including the State of Texas, as to the making of the improvements in accordance herewith;  provided, however, that in the event the City of Corpus Christi conveys or leases all or any part of said land to any other person, persons, firms, corporation or entity of any nature, said city shall pay to the Texas Permanent Free School Fund a sum equal to one-half (1/2) of the reasonable market value thereof.
Sec. 6. PLANS AND CONTRACTS FOR IMPROVEMENTS;  POWERS OF CITY.  The City of Corpus Christi is hereby authorized to prepare or approve plans for the improvements covered by this Act, and to make and enter into such agreements or contracts relating to such improvements as in the judgment of the governing body thereof may be necessary or desirable, and such agreements or contracts may be with grantees or prospective grantees of all or any portion of the land subject to this Act, or other parties.
Sec. 7. REPEALER.  The land subject to this Act, as identified in Section 1 hereof, shall henceforth be held subject to the provisions of this Act and all laws or parts of laws in conflict herewith are hereby repealed or modified to the extent of such conflict.
Sec. 8. LAW CUMULATIVE.  This Act shall be and is cumulative of all former grants and authorities from the State of Texas to the City of Corpus Christi.