799.Paragraph 12 inserts new sections 47E to 47H into the 1956 Act dealing with demise charterers. A demise charter is a type of lease of a ship (often including the services of the master and crew). A demise charterer takes possession of the ship and operates the ship. The length of demise charters can vary from short (1 or 2 years) to long (20 years or the lifespan of the ship). Often the charterer has an option to buy the ship outright at the end of the agreed term. In practice the demise charterer is treated as the owner of the ship as the charterer has control over the operation of the ship and over the master and crew. But the owner in the legal sense remains the person who granted the charter.