pe 2 students ,pcc student... eligibility 4 final ?

can any one tell when will a student be eligible for appearing in finals........who converted to pcc and subsequently  passes pcc,from pe2 stream........and is under going articleship.

will it be

1.after 3 and half years ?

2.during the last six months of his/her articleship ?

3.after two years of articleship ?

theres great bit of confusion over d issue.........

does any one knows the authentic rules.......?