revalidation of ca fina registration.

hiii guys.. my ca final reg. is expired last month and i have to revalidate the same and at the same tine i also want ti convert my old syllabus into new one... so anyone can tell me that if i convert into new ca final course from old one then whether i hve to get revalidate my ca final reg. first.or not... or conversion merely leads to revalidation as well.... pls guide me..