Answer: subject to any change that Ozzie and Ray make
Explanation: Terms of a contract refers to the bindings, rules and principles guiding a particular contract or agreement. Since the contract right to modification is reserved by only Ray and Ozzie, Scholar's University right to payment of Thalia's tuition is subject to any changes or modification made by both Ray and Ozzie since they reserve the right to modify the contract terms for the sale of the 500 shares of stock in Premium Quality Inc.