Demurrage refers back to the fees imposed when cargo continues to be in a port or terminal further than the permitted spare time. This spare time is generally allotted for unloading or loading cargo, but when this period is exceeded, shipping firms impose demurrage charges over the trader. Free Time: https://marcoqlvhj.creacionblog.com/34890408/detailed-notes-on-6-difference-between-hs-code-and-hsn-code