CBU - Completely Built-Up (or fully imported)
CKD - Completely Knocked-Down (or local assembly)
S-KD - Semi Knocked Down ( very little assembly like doors, head lamps and rear combination lamps)

Cerato is on S-KD basis, as there is no AP involved.
It would not be feasible to do CBU for Cerato and to commit high volume, as government has limitation on issuance of AP (approved Permit) for obvious reasons.

Hope my message helps.

Regards.
KS Loh