Simplify the following text for a Grade 9 native English-speaking person.
Original: 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 .
Simplified: 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 .