Prior to April throughout the 2018 calendar refer to DowDuPont governance guidelines found at http://www.dow-dupont.com/investors/ corporate-governance/default.aspx. 102-28 Evaluating the highest governance body's performance Effective April 1, 2019, refer to page 4 of the Dow Inc. Corporate Governance Guidelines at https://investors.dow.com/en/corporategovernance/board-committees/default.aspx.