SIXTH AMENDMENT TOKeystone Tax Free Fund • April 29th, 1997 • Massachusetts
EXHIBIT 99.6 PRINCIPAL UNDERWRITING AGREEMENT KEYSTONE TAX FREE FUND AGREEMENT made this 19th day of August, 1993 by and between Keystone Tax Free Fund (the "Fund"), and Keystone Distributors, Inc., a Delaware corporation (the "Principal...Principal Underwriting Agreement • April 29th, 1997 • Keystone Tax Free Fund • Massachusetts
EXHIBIT 99.5(B) INVESTMENT ADVISORY AGREEMENT Agreement dated August 19, 1993 between KEYSTONE MANAGEMENT, INC., a Nevada corporation (the "Manager") and KEYSTONE CUSTODIAN FUNDS, INC., a Delaware corporation (the "Company"). WITNESSETH: That in...Investment Advisory Agreement • April 29th, 1997 • Keystone Tax Free Fund
Agreement dated August 19, 1993 between KEYSTONE TAX FREE FUND, a Massachusetts business trust organized under a Declaration of Trust dated July 27, 1993 (the "Fund"), and KEYSTONE MANAGEMENT, INC., a Nevada corporation (the "Company"). WITNESSETH:Investment Management Agreement • April 29th, 1997 • Keystone Tax Free Fund
