Proper officer designation for GST registration and composition assigned to regional tax officers enabling registration, amendment and cancellation functions. Notification designates specific regional Commercial Tax Officers as the Proper Officer for registration and composition under the Puducherry GST Act, authorising them to handle composition levy validity, application verification and approval, issuance of registration certificates, amendment, cancellation and revocation of registration, assignment of unique identity numbers, suo moto registration, migration from existing law and physical verification of premises.