Registration under section 12AB: time bound orders, provisional registration and cancellable status for specified violations. Registration under section 12AB requires the Principal Commissioner or Commissioner, after making necessary enquiries and calling for documents to satisfy themselves about genuineness of activities and legal compliance, to pass a written order registering for five years or provisionally for three years where applicable. The authority may cancel or refuse registration on finding a specified violation-including income misapplication, non incidental business without separate books, private or community benefit, non genuine activities, or final adverse orders-with prescribed notice, hearing and statutory time limits for orders.