lastage

Etymology

From lestage (“ballasting”), from lest (“ballast”), or Latin lastagium, lestagium. See last (“a load”).

noun

A duty exacted, in some fairs or markets, for the right to carry things where one will.
A tax on wares sold by the last.“The better regulation of lastage and ballastage in the Thames.”
The lading of a ship; ballast.“All maner of shyppes[…]shall brynge with them all theyr lastage of good stones.”
Room for stowing goods, as in a ship.