The rest of this study is organized as follows. First, we offer a brief review of the commercial policies of the AMCs in Section 2. Next, we present and analyze key issues in aligning ASEAN commercial policies in order to build the ACU in Section 3, a process which promises to be complicated. Section 4 surveys quantitative estimates of the impact of regional economic integration in ASEAN through AFTA, followed in Section 5 by a comparison of the economic and political-economy effects of an ACU compared to AFTA. Finally, Section 6 gives some concluding remarks and recommendations.