Input-output norms for inhaler manufacture require specific component ratios and verification that imports are used in exports.

Standard Input-Output Norms for inhaler manufacture under SION A2391 require the bulk drug to be accounted net-to-net, permit aerosol valves, aluminium cans and actuators at marginal excess ratios (1.01 per finished unit), and mandate that applicants ensure imported goods are those used or required in the export product in accordance with declared input proportions and the Drug Manufacturing Licence.

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