按期租合約對等基準是什麼(20mark)

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.
For more details, you can go to :
http://en.wikipedia.org/wiki/Charter-party
http://www.irasia.com/listco/hk/pacbasin/profile.htm