Exhibit 1.1(b) Nuveen Unit Trusts, Series 31 Trust Indenture and Agreement Dated: February 9, 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 • February 9th, 1999 • Nuveen Unit Trusts Series 31
