Advance authorisation recordkeeping: duty free inputs for NI pharmaceutical exports must be registered and certified. Appendix 4I prescribes a register for accounting duty free inputs under advance authorisation for pharmaceutical products made via Non Infringing process, recording authorisation details, input names and quantities, exported products, inputs consumed (including wastage), balance inputs, proportional adjustments for excess or partial imports, additional exports, and customs duty paid. The authorisation holder must declare correctness and provide supporting documentary evidence as required. A Chartered Engineer/Central Customs certificate format mandates verification of production records, export quantities and per unit input consumption, with solvent allowance rules and Customs verification specified.