EXHIBIT 10.18 Hines-Sumisei U.S. Core Office Fund, L.P. 2800 Post Oak Boulevard, Suite 5000 Houston, Texas 77056 June 3, 2004 Hines US Core Office Capital LLC Hines US Core Office Capital Associates II Limited Partnership Hines REIT Properties, L.P....Rights Agreement • June 10th, 2004 • Hines Real Estate Investment Trust Inc • Real estate investment trusts
