MODCHQ - SET UP AND MAINTENANCE Ó UNCTAD – SITE (V1.15) 10.10 Rule If a Rule is inserted in this box the system will ignore any Market Value defined in the Market Value record and expects the Statistical or Customs value to be defined in the rule. (‘Rules’  are described on page 12.) The "CustValue" variable Within the System the result of a market value calculation is written to the variable  'CustValue'. If no ‘Market Value’ is defined for the Commodity then ‘CustValue’ has the same value as ‘StatVal’. If the ‘Replace Statistical Value’ box is ‘YES’ then the declaration Statistical value will be reset to the calculated Market value. Tax calculations are usually defined in  MODCHQCF  (see Section 08 for   details)   and   are   normally   written   to   charge   Duties   and   Taxes   on   the   Statistical   Value   or ‘StatVal’, but where   ‘Replace Statistical Value’  is  set  to  ‘YES’  this  will  cause  the  Duties  and Taxes to be charged on the calculated Market Value. Using a Market Value To use a 'Market Value' in a tax calculation requires the following steps: 1. ‘Market Value’ is defined for the Commodity specifying unit values; 2. The Replace Statistical Value is set to  ‘YES’ and 3. The name of the 'Market Value' to be inserted in the Market Value box within the Commodity Code update window. This example shows a ‘Market Value’ called “MV0201” inserted Commodity Code 020120. Fig. 10.8  MODCHQ : Functions: Database management: Customs tariff: Commodity code: Update To the user entering a Customs declaration in the Customs or Declarant Office, the existence of a Market Value is shown within the ‘Valuation Note’. (For an explanation of  ‘Valuation Note’ within declarations, see Section 3, ‘Customs Declarations’ ). Fig. 10.9  MODCBR: Functions: Declaration: Amendment: F9 Local menu: Quadrants: Valuation note General Note This option allows the definition of a rate that has general application throughout the Tariff.