<h1>Input usage compliance for alumina fused cast refractories requires imported materials match those used in the declared export product.</h1> Specification prescribes permitted inputs for alumina fused cast refractories-primary inputs being calcined alumina (alumina 80%+) and zircon/zirconia/baddelyet-and miscellaneous items such as graphite electrodes, graphite moulds and cutting tools. It requires determination of input proportions for resultant products and mandates that applicants ensure imported goods are those used or required in the declared export product.