Central excise registration for import export

Sirs

MY COMPANY IS ONE OF THE BUS BODY BUILDER SITUTED IN CHENNAI,  COMPANY IS PLANNING FOR EXPORT.

BUS CHASIS AND BUS AC UNIT IS IMPORTING FROM CHAINA AND RE EXPORT TO DUBAI. MY QUESTION IS THAT

CENTRAL EXCISE REGISTRATION IS MUST FOR IMPORT EXPORT.

REGARDS

ARUNKUMAR