The implementation of the National Single Windows and the ASEAN Single Window together with the
reform and modernisation of customs will jointly redress the highly disparate customs environments in
the region, thereby engendering faster and more predictable flow of goods within the region and from
the region and the rest of the world. This initiative requires a change of essential features of customs
control, expressed in customs procedures and practices. Foremost of all, making them compatible and
interoperable is a key to enhanced ASEAN connectivity. Indeed, the deepening and widening of the
regional production networks in the region, which means larger volume of time sensitive imports moving
within the region, necessitates more efficient and consistent customs service in the ASEAN Member
States. However, a more efficient and consistent customs service demands a more efficient and effective
coordination of related government agencies with the customs service in each of the ASEAN Member
States. The implementation of the National Single Windows and the ASEAN Single Window facilitates
the streamlining of processes and procedures, engenders tight coordination of related government
agencies and trade-related service providers in the private sector, and fosters greater transparency
and predictability on trade-related rules, regulations and procedures. All these redound to faster, easier,
more predictable, and more cost effective movement of goods that would ultimately benefit the ASEAN
Member States and lead to deeper ASEAN economic linkages.