Resources UNCEFACT Recommendation 33 – http://www.unece.org/fileadmin/DAM/ce fact/recommendations/rec33/rec33_trd3 52e.pdf http://www.unece.org/fileadmin/DAM/ce fact/recommendations/rec33/rec33_trd3 52e.pdf WCO Single Window Compendium – http://www.wcoomd.org/en/topics/facilit ation/activities-and-programmes/single- window/single-window-guidelines.aspx http://www.wcoomd.org/en/topics/facilit ation/activities-and-programmes/single- window/single-window-guidelines.aspx