4810.99.30.00 - Cards, not punched, for punch card machines, whether or not in strips

This HTS classification, 4810.99.30.00, specifically addresses cards designed for use with punch card machines. These are paper or paperboard products, coated on one or both sides with kaolin or other inorganic substances without other coatings. Crucially, the primary defining characteristic is their intended function: to be processed by punch card machinery, whether they are provided as individual cards or in continuous strips.

Within the broader category of "Other paper and paperboard" under 4810.99, this specific subheading is distinguished by its functional purpose rather than solely by its material composition or form. While other "Other" subcategories at this level may encompass a wider array of paper and paperboard products, 4810.99.30.00 is narrowly defined for these specialized data-processing cards. The absence of further subdivisions indicates that this is a terminal classification for this particular type of product.