What is the tolerance threshold under the Ceuta & Melilla?

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

Ceuta & Melilla - HS 67

EU Autonomous Preferences for Ceuta and Melilla

1 RegelnToleranz: 10%

6700-6799Prepared feathers and down and articles made of feathers or of down; artificial flowers; articles of human hair

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