Explanatory notes
… vulcanised or hard : natural rubber, balata, gutta‑percha, guayule, chicle and similar natural gums, synthetic rubber, … such as vulcanising activators or accelerators, may be added; the presence of substances as provided for by … products : (1) Natural rubber, balata, gutta‑percha, guayule, chicle and similar (i.e., rubber‑like) natural gums …Legal note
… vulcanised or hard : natural rubber, balata, gutta‑percha, guayule, chicle and similar natural gums, synthetic rubber, … such as vulcanising activators or accelerators, may be added; the presence of substances as provided for by … its classification in heading 40.01 or 40.02, as the case may be, provided that such rubber or mixture of rubbers …