MODCHQ - SET UP AND MAINTENANCE Ó UNCTAD – SITE (V1.15) 10.6 Database Management This option is used to maintain all the tables including all the codes and the tariff.  It is the option that will be extensively used when you set up your system. Customs Tariff The first sub menu option, ‘Customs Tariff,’ deals with all aspects of tariff maintenance. It allows the modification of the Commodity Code descriptions, National Notes, the definition of Commodity Codes at national level, the insertion of rates against Commodity Codes and the management of tables listing Preferences, Statistical Units, Market Values and General Notes. Sections, Chapters and Headings The first 4 sub-options deal with the description and notes on the different parts of the Tariff. These options follow the formal structure of the Harmonized System tariff. Fig. 10.2   ‘MODCHQ: Functions: Database Management: Customs Tariff: HS Codes’ The screen above relates to the Harmonized System tariff code, (HS Code), but all of these sub options are broadly similar.  The description and notes can be amended for all of the tariff divisions, chapters, headings and HS Codes. A  sub  chapter  and  subheading  option  exists.  The  relevant  level  can  be  amended,  created,  or deleted. Note:   As the System comes pre-loaded with the standard  Harmonized Tariff, changes at this level would usually be restricted to descriptions, for translation to other languages at initial installation and set up. National Notes The 5th sub option  ‘National notes’   allows  the  definition  of  National  Notes  that  can  be  added  at Tariff Section and Chapter level. National notes at the HS level are used to expand on or to explain HS interpretation in a National context.