Sec. 4. CONTENTS OF DEEDS;  CONTRACTUAL TERMS.  Each deed to be executed as provided for in this Act shall contain by reference any and all easements, reversions, and restrictions to which any tract or tracts conveyed by any party is subject or agreed upon;  provided, however, that no deeds shall be exchanged until a contract is negotiated and executed between the Board of Regents of The University of Texas and the governing board of the Children's Medical Center of Dallas which shall obligate the governing board of the Children's Medical Center to construct and operate a children's hospital as a teaching hospital fully integrated with the medical program of The University of Texas Southwestern Medical School, without cost to the State of Texas and which contract shall contain such other terms and conditions as the Board of Regents of The University of Texas shall deem reasonable.