Explanatory notes
… : (i) They must be identifiable as being suitable for use solely or principally with the goods of the … heading include : (I) Parts of balloons and dirigibles , such as : (1) Nacelles. (2) Envelopes and parts … components (spars, ribs, cross-members). (3) Control surfaces, whether or not movable (ailerons, slats, spoilers, …