Rule 28
Power To Demand Documents
(1) The Director General or the customs Officer who conducts Post Clearance Auditor, may ask for the documents as required, for the purpose of auditing from the bank, financial institution, any person or institution relating to the importer’s business  transaction or goods regarding the payment, Bank deposit, profit and loss  account, tax returns, invoices, and other documents etc.
(2) It shall be the duty of the concerned bank, financial institution or other agencies to make available the documents as requested pursuant to Sub-rule (1).
(3) Department may frame and implement procedure to manage and simplify post clearance audit and the procedure so framed shall not contravene the provisions of the Act and these Rules.