Input (grade 13): The West Island Line and South Island Line, first put forward to the government by MTRCL on 21 January 2003, only received approval on 30 June 2005 after its heavily-modified fourth proposal.
Output (grade 12): The West Island Line and South Island Line, first suggested to the government by MTR on 21 January 2003, was finally accepted on 30 June 2005.