Optical checking instrument classification applies to the HPV diagnostic platform, attracting customs duty and import IGST under heading 9031.

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....The BD Viper LT System, an automated PCR-based platform for detecting high-risk HPV DNA, is classified as an optical checking instrument under tariff item 9031 49 00 rather than as an instrument for chemical analysis under heading 9027. The system processes specimens, generates and compares fluorescence signals against prescribed criteria, and reports positive or negative results; this constitutes checking rather than examination or measurement of the specimen's chemical properties. Classification follows Rule 1 because heading 9031 describes the goods, making Rule 3 inapplicable. The applicable basic customs duty is 7.5% ad valorem, and import IGST is 18%.....