Articleship period for pe-2 to ipcc converted students ?

I have commenced my articleship. i want to know my articleship period. i was a pe-2 student, recently converted to IPCC. On basis of clearing group-1 in pe-2 , i have commenced my articleship. I want to know the period for which i have to work as articled assistant.
Also regarding form 102, what is non-judicial stamp?? n how much is requisite value ?? how is it to be done??