6803 Worked Slate and Articles of Slate or of Agglomerated Slate (Excl. Slate Granules, Chippings and Powder, Mosaic Cubes and the Like, Slate Pencils, and Ready-to-use Slates or Boards With Writing or Drawing Surfaces)

6803 (01/1988-..) Worked Slate and Articles of Slate or of Agglomerated Slate (Excl. Slate Granules, Chippings and Powder, Mosaic Cubes and the Like, Slate Pencils, and Ready-to-use Slates or Boards With Writing or Drawing Surfaces) 68030000 (01/2011-12/2011) Worked Slate and Articles of Slate or of Agglomerated Slate (Excl. Slate Granules, Chippings and Powder, Mosaic Cubes and the Like, Slate Pencils, and Ready-to-use Slates or Boards With Writing or Drawing Surfaces) 68030010 (01/2012-..) Roofing and Wall Slates, Worked 68030090 (01/2012-..) Worked Slate and Articles of Slate or of Agglomerated Slate (Excl. Slate Granules, Chippings and Powder, Mosaic Cubes and the Like, Slate Pencils, Ready-to-use Slates or Boards With Writing or Drawing Surfaces, and Roofing and Wall Slates)