To ensure timely completion of the work programme for harmonization, such work shall be conducted on a product sector basis, as represented by various chapters or sections of the Harmonized System (HS) nomenclature.

• 为保证协调工作计划及时完成，该项工作应在协调制度(hs)税则目录的不同的章或类所代表的产品部门基础上进行。