<h1>Input-output norms for aluminium alloy ingots require declared input composition and proof that imported inputs are used in exports.</h1> Standard input-output norms set permitted input materials and proportional allowances for manufacture of Aluminium Alloy Ingots, listing aluminium scrap/ingot, copper scrap, silicon, zinc scrap, manganese, magnesium and other metals against one kilogram net content. Applicants must furnish the actual product composition to verify adherence. A schedule requires determination of usable input proportions and mandates that imported goods match those actually used or required in the export product, creating an evidentiary obligation linking declared inputs, imports and composition documentation.