Exhibit 1.1 VAN KAMPEN UNIT TRUSTS, SERIES 805 TRUST AGREEMENT Dated: October 21, 2008 This Trust Agreement among Van Kampen Funds Inc., as Depositor, The Bank of New York Mellon, as Trustee, and Van Kampen Asset Management, as Supervisor, sets forth...Trust Agreement • October 21st, 2008 • Van Kampen Unit Trusts Series 805
