Employment renewal details


i missed my employment renewal in June 2007. Is there any grace period given by govt. for renewing it? who is the appropriate to check on this? when i go to employment exchange, they say to register it newly. but if i go with their words, my seniority will go off. so what is the exact way / option given for this? Is there anybody can shade / pour some lights to me on this regard? i am aware one grace perid is given for candidates who missed to renew in 2008-2011.