Riding lawn mowers with a horizontal rotating cutting device are classified under 843311 when designed for lawn, park, or sports ground use. They are not classified as motor vehicles or works trucks. The classification turns on the primary function being grass cutting rather than transportation, and on the cutting mechanism — horizontal rotating blade versus other types covered by 843319.

Machines for cleaning, sorting, or grading eggs, fruit, or agricultural produce under 843360 include mechanically operated sorters as well as those incorporating optical or electronic sensing systems, provided the machine's principal function is sorting or grading agricultural produce. If the electronic or optical component is the dominant functional element and the machine is more properly described as an instrument or apparatus, classification elsewhere may apply — a binding ruling is advisable for sophisticated sensor-based sorters.