Polyethylene and polypropylene ropes fall under subheadings 560741 or 560749, while rope of other synthetic fibers — including polyester — falls under subheading 560750. The fiber composition of the rope determines the correct subheading, so fiber content documentation from the manufacturer is essential.

Within both the sisal and the polyethylene/polypropylene groups, the tariff schedule separates binder and baler twine (used in agricultural harvesting machinery) from all other twine, cordage, rope, and cable of the same fiber. The baler twine subheadings carry their own duty rates and are specifically intended for agricultural use; general-purpose rope and cordage of the same fiber goes to the corresponding 'other' subheading.