(1) No candidate shall be admitted to the Final Examination unless he has passed:- (i) the Intermediate (Professional Competence) Examination in its entirety, held under these regulations; (II) completed the practical training as is required for admission as a member on or before the last day of the month preceding the month in which the examination is held or has been serving the last six months of practical training under Regulation 50 on the first day of the month in which the examination is held. (III) he produces a certificate to the effect that he has undergone a study course for such period, as on the first day of the month in which examination is held, in such manner as may be decided by the Council from time to time; and (iv) completed the Advanced Course on Information Technology Training under these regulations for such period and in such manner as may be decided by the Council, from time to time.;
As per Regulation 50 of the CA Regulations, 1988, a student will be eligible to appear in Final Exam, after completing of 30 months (2 Years and 6 months) of article ship.
As per this you will be eligible for Nov 2015 attempt, if you register in article ship till April 30, 2013. You register you self before completing of 30 months of article ship.