Exhibit 1.1(b) Nuveen Unit Trusts, Series 68 Trust Indenture and Agreement Dated: October 26, 1999 This Trust Indenture and Agreement by and between John Nuveen & Co. Incorporated, as Depositor and The Chase Manhattan Bank, as Trustee, sets forth...Trust Indenture and Agreement • October 26th, 1999 • Nuveen Unit Trusts Series 68
