Davao City business leaders and some political parties gather in Davao City for a conference entitled, "Pursuing Federalism: A Shift from Unitary-Presidential to Federal-Parliamentary Government" organized by the Centrist Democracy Political Institute (CDPI) in collaboration with the Philippine Chamber of Commerce and Industry (PCCI) and Davao City Chamber of Commerce and Industry (DCCI), Inc on the Proposed Revision of the 1987 Constitution by the 2005 Consultative Commission to support and promote the initiatives of President-elect Rodrigo Duterte's Administration.