In the case of exports, demurrage time refers back to the period between a full container coming into a terminal and getting loaded on to a ship. For imports, demurrage time could be the period between a full container becoming discharged through the ship and leaving the terminal. For example, https://sethsmmny.madmouseblog.com/15568385/not-known-factual-statements-about-61-import-finance-solutions-for-distributors