Supplementry Articles???

Hi Freinds,

My Articles are Going to be Complete in Month the of July 2011.  During the period of Articles i have taken 1 year 3 Months leave..

1) My Remaining period of Articles whether i have to Continue with the same principal or there is a Option for change?

2)If I Did " Supplementry Articles" it May Effect to our Carrer???

3) What are the Rules to be Followed for Change of Principal???

This is Sudheer.