Goods which transit the port of Singapore without offloading are
subject to no control. Goods which are landed in the colony for the
purpose of transshipment on a through bill of lading to another
destination are also subject to no local license or declaration, as
long as such goods remain in the custody of the harbor board or of the
agent of the ship from which landed. Transshipment goods not on through
bills are treated as reexports, and are subject to full export control.