 The Asian Development Bank also has doubts about Cambodia's ability to meet the AEC deadline.The leading economist of ADB, Jayant Menon, said that Cambodia needs to speed up its customs reform and to press ahead with automating processes to reduce trade costs and minimise the opportunities for corruption and be ready for the implementation of its National Single Window by 2015.Despite an ASEAN Economic Community goal of significant economic integration as laid out in the AEC Blueprint 2025, ASEAN continues to face challenges towards integration.