ASEAN Single Window. The implementation of measures of simplifying, harmonising and
standardising trade and customs, processes, procedures and the application of ICT in all areas related
to trade facilitation would be paramount in the ultimate creation of an ASEAN Single Window. The
ASEAN Single Window is an environment where ten National Single Windows of individual Member
Countries operate and integrate. National Single Window enables a single submission of data and
information, a single and synchronous processing of data and information and a single decisionmaking
for customs clearance of cargo, which expedites the customs clearance, reduce transaction
time and costs, and thus enhance trade efficiency and competitiveness.