Diffuser input-output norms set specific aluminium input weights and require imports to match materials used in export production. Input-output norms for diffusers and parts manufactured without joints from aluminium sheets specify alternative primary inputs (aluminium ingot or rolled aluminium sheet in coil form) with input weights of approximately 1.05-1.15 kg per 1 kg of finished product and an aluminium scrap allowance of about 1.20 kg; applicants must ensure imported goods correspond to materials used or required in the exported diffuser product and the entry is suspended by Public Notice No. 03/2024-25 dated 03-05-2024.