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lay daysthe period within which, according to the terms of a charterparty, cargo must be loaded on to or unloaded from a ship.
LAY DAYS, mar. law. The time allowed to the master of a vessel for loading and unloading the same. In the absence of any custom to the contrary, Sundays are to be computed in the calculation of lay days at the port of discharge. 10 Mees. & Wels. 331. See 3 Esp. 121. They differ from demurrage. (q.v.)