MODCHQ - SET UP AND MAINTENANCE Ó UNCTAD – SITE (V1.15) 10.15 See   the   other   parts   of   this   Section   and   also    Appendix   ‘A’ ,   ‘Taxation Management’,   for   more   detail   on   taxation   rules   and   explanation   on   the programming language used within rules. Commodity Code This option allows all of the normal Tariff update functions. It permits the definition of national sub divisions of the Commodity Code and the insertion of rates in the Tariff columns.  It also allows the insertion of Statistical Units, Market values, National notes and Taxation Rules. The screen is too large to be displayed on screen at one time but the bottom part of the screen can be scrolled in the normal way.         Fig. 10.12  MODCHQ : Functions: Database Management: Customs Tariff: Commodity Code To create a national Tariff Commodity Code sub-division the ‘Create’ option is used. To insert rates etc normally only requires the ‘Update’ option. The screen allows the inclusion of up to three Supplementary Statistical Units. When a declaration is  processed  that  has  a  Commodity  Code  with  one  or  more  Supplementary  Units  defined,  the Supplementary Unit field or fields on the SAD becomes mandatory. The insertion of a predefined Market value will apply that Market Value in the way that is defined in the value including any applicable rule. A predefined National note can also be inserted in the Commodity Code using this menu option. For example: if in your tariff a trade agreement applied to goods of Chapter 30, and Additional Column number 20 gave a reduced rate of import duty of 5% for Chapter 30. Use an Item Taxation Rule to recalculate duty. The rule will include: A conditional statement: e.g. ‘If country is an eligible preference country and the Column 20 preference code is claimed then’ Action is RelTaxPart(“ID”, “PRF20”, CustValue, RateCol(Comcod, 20), CustValue * RateCol(Comcod, 20)/100));