port toll

from The Collaborative International Dictionary of English v.0.48
Port \Port\, n. [AS. port, L. portus: cf. F. port. See {Farm},
   v., {Ford}, and 1st, 3d, & 4h {Port}.]
   1. A place where ships may ride secure from storms; a
      sheltered inlet, bay, or cove; a harbor; a haven. Used
      also figuratively.
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            Peering in maps for ports and piers and roads.
                                                  --Shak.
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            We are in port if we have Thee.       --Keble.
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   2. In law and commercial usage, a harbor where vessels are
      admitted to discharge and receive cargoes, from whence
      they depart and where they finish their voyages.
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   {Free port}. See under {Free}.

   {Port bar}. (Naut,)
      (a) A boom. See {Boom}, 4, also {Bar}, 3.
      (b) A bar, as of sand, at the mouth of, or in, a port.

   {Port charges} (Com.), charges, as wharfage, etc., to which a
      ship or its cargo is subjected in a harbor.

   {Port of entry}, a harbor where a customhouse is established
      for the legal entry of merchandise.

   {Port toll} (Law), a payment made for the privilege of
      bringing goods into port.

   {Port warden}, the officer in charge of a port; a harbor
      master.
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from Bouvier's Law Dictionary, Revised 6th Ed (1856)
PORT TOLL, Mer. law., By this phrase is understood the money paid for the 
privilege of bringing goods into a port. 
    

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