Standard input-output norms for current transformers require imports to match specified component composition and actual export use. Standard input-output norms prescribe component types and specified weights or volumes for manufacture of outdoor current transformers and set the basis for determining permissible proportions of inputs for different resultant products. Applicants and importers must ensure that goods imported correspond to the inputs actually used or required in the declared export product; administrative determination of input proportions governs compliance. The SION entry is noted as suspended by the relevant public notice, affecting the norm's operational status.