Standard unit quantity declaration mandatory in bills of entry; submission blocked unless standard UQC declared. Declaration of the Standard UQC in Bills of Entry is mandatory and submissions will be blocked unless SQC and corresponding quantities are separately declared in the Single Window Table. The Single Window entries must use Info_Type CHR, Info_QFR SOC; Info_MSR must carry the quantity in the Standard UQC and Info_UQC must contain the SQC code, which will be validated against the Tariff code directory.