Service tax applicable on sale of residential flat

Dear All members,

My this query is regarding Service tax applicabilty on Sale of Flats, and query is as follows

Mr. A (Builder) , has sold a unit to customer in Sep -11  and date of Agmt is 15/09/2011.  and date of Occupancy Certificate is   25/12/2011.

Now, whether service tax applicable to Mr. A. if,  all the amount ( Except token ) received after 25/12/2011.

Waiting for your reply.

Regards,

Ritesh