| section 16 | Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles |
| chapter 84 | Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof |
| 84.09 | Parts suitable for use solely or principally with the engines of heading 84.07 or 84.08: |
| －Other: |
| 8409.91 | －－Suitable for use solely or principally with spark-ignition internal combustion piston engines: |
| －－－For engines of a kind used for the propulsion of vehicles of Chapter 87 |