MODCHQ - SET UP AND MAINTENANCE Ó UNCTAD – SITE (V1.15) 10.9 Fig. 10.6  MODCHQ : Functions: Database Management: Customs Tariff: Tariff Components: Statistical Units Wherever possible the statistical unit codes, and the descriptions in the table of the  units  of  measurement,  should  conform  to  international  standards.  See  the UN Trade Data Elements Directory for guidance. Market Value This  option  allows  the  setting  up  of  a  system  to  allow  the  user  to  either  monitor  valuation  or  to nominate a set value as the tax base. By setting up the market value under this option the System calculates  a  market  value  from  the  declaration  data  and  displays  this  calculated  value  on  the screen within the  'Item Valuation Note' window. This ‘Market Value’  is  linked  to  the  Commodity Code so this value can also be used in tax calculation. The  Market  Value  is  set  up  by  defining  an  import  and/or  export  value  against  one  or  all  of  the statistical units or a unit already captured on the declaration, for example, $500 per tonne or $10 for each Supplementary Unit of quantity. For more complex calculations, the Market Value window has the option of inserting a Rule. This is written in MODCHQ using the sub-menu option  'Rule'. The Use HIGHEST VALUE box. This field will accept either ‘YES’ or ‘NO’. If  ‘YES’ the system will calculate the highest calculated value from the mass or statistical units defined, if ‘NO’ the system will use Gross Mass. The Replace Statistical Value box. If this is ‘YES’, the declared statistical value will be replaced by the calculated market value. Fig. 10. 7 MODCHQ : Functions: Database management: Customs tariff: Tariff components: Market Value: Update