Classification hinges on principal function: if the unit's dominant commercial purpose is transaction recording and receipt issuance, it generally remains a cash register. Once the device is designed primarily as a general-purpose computer that incidentally handles sales transactions, or if it performs printing and copying functions independently, reclassification to an ADP or multifunction heading becomes appropriate. Borderline cases require review of technical specifications and marketing documentation.

Cash registers sourced from certain origins may be subject to Section 301 tariffs depending on country of origin and applicable HTS classification at the 10-digit level. Importers should verify current Section 301 lists and any applicable exclusions with a licensed customs broker before entry.