What is the tolerance threshold under the EU-Switzerland?

The general tolerance is 10% of the ex-works value of the finished product.

EU-Switzerland - HS 83

EU-Switzerland Free Trade Agreement

1 RegelnToleranz: 10%1973

8300-8399Miscellaneous articles of base metal

CTH

Manufacture from materials of any heading, except that of the product.

ODER - alternative Regel

MaxNOM

Manufacture in which the value of all the materials used does not exceed 50% of the ex-works price of the product.

50% ex-works