Female water buffalo at or above 320 kg that are neither purebred breeding animals nor bison fall into this residual tariff line, where sex and weight together determine classification. The combination of a weight floor and a sex-specific breakpoint means importers must have both a certified weight record and clear species and sex documentation from the exporting country's veterinary authority. USDA APHIS governs admissibility through import permits and health certificate requirements, and any discrepancy between declared and actual weight at the port of entry can trigger reclassification.

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