Artivleship extension for industrial training

hello

I am in my last year of training and have 6 months to go for completion of articleship training. i wish to take up industrial training. 

Is there any way in which i can extend my training period by showing excess leaves etc. so that i can undergo minimum 9 months of industrial training.

please also let me know the procedure to go about this. 

please help me this is urgent.