DELTA SIGMA PHI FRATERNITY PROPERTY 4/9/70 (70-25) Authorized negotiations with the Delta Sigma Phi Fraternity for the purchase of property at 2429 Prospect Ave. 12/6/72 (72-77) Authorized purchasing the Delta Sigma Phi Fraternity property at 2429 Prospect Ave for $124,000 on or before 6/30/73, provided that the Fraternity agrees to vacate said property on or before 8/31/73.