What is the tolerance threshold under the EU-Tunisia?

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

EU-Tunisia - HS 88

EU-Tunisia Euro-Mediterranean Association Agreement

5 RegelnToleranz: 10%1998

8801-8802Aircraft, spacecraft, and parts thereof

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 40% of the ex-works price of the product.

40% ex-works