Charterparty

Charter Party (Lat. charta partita, a legal paper or instrument, divided, i.e. written in duplicate so that each party retains half), a written, or partly written and partly printed, contract between merchant and shipowner, by which a ship is let or hired for the conveyance of goods on a specified voyage, or for a defined period. Also, a written contract between shipowner and charterer whereby a ship is hired; all terms, conditions and exceptions are stated in the contract or incorporated by reference.
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A transportation contract which includes the full and exclusive use of the airplane, vehicle or vessel for the duration of the transportation of either goods or persons. - (read more on Charterparty)