as per my view. if you are going or completed 15 month training , you are switch to new taining structure. the ongoing and completed training period is laps. you have to start new training as per new training structure.
as far as confirmation letter, you have to take from your employer , whether your training is going on or completed...
frm. NIKUNJ PATEL. GUJARAT.
BCOM, MBA-FINANCE, LLB, CA-FINAL,CS-FINAL.
email. patelnikunj_1@yahoo.com