Can lessee give notice in lock-in period of a lease.

I want to know Can lessee give notice in lock-in period of a lease to lesser? Following are the relevant lease terms - 1. That the lease period be of 3(three) yearsvi.e. 1.6.2013 tp 1.6.2016. The first lock-in period of this lease is minimum One year. The lessee cannot sublet the premises to any other company/person/party. This will result in immediate termination of agreement,forfeiture of security and it will be considered the premises vacated by lessee. Notice Period:- 2. That if lessee wants to vacate the leased premises after completion of lock-in period then he will give written notice of three months in advance to lesser. With these lease terms can lessee give notice within one year so that he can evacuate it just after 1 year i.e. 31.5.2014? Or he has to wait for the completion of lock in period (One year) before giving notice to the lessor?