Maximum number of attempts

the registration for PCC/PE-II Course will be valid for a period of 5 years from the date of initial registration. Further the registration will continue to be valid as long as the student continues to appear in either or both groups of the PCC exam irrespective of the period involved which may be beyond five years. After expiry of the period of 5 years from the date the student initially registered himself/herself for PCC/PE-II course his registration will lapse except where such student has appeared in at least one of the last two examinations conducted just before the end of five years. The registration of such student shall however lapse in case he subsequently does not appear in two consecutive examinations.

however u can re-register 

source-https://www.icai.org/post.html?post_id=666&c_id=121