GR-5.1.1
Whenever they are aware of such cases, 
(a) A new controller ;
(b) An existing controller  increasing its holding from below 20% to above 20%;
(c) An existing controller  increasing its holding from below 50% to above 50%; and
(d) An existing controller  reducing its holding from above 50% to below 50%.
Amended: July 2007
 
  
        