What is the tolerance threshold under the EU-Mexico?

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

EU-Mexico - HS 04

EU-Mexico Global Agreement (FTA part)

3 RegelnToleranz: 10%2000

0401-0402Dairy produce; birds' eggs; natural honey; edible products of animal origin, not elsewhere specified or included

Manufacture in which all the materials of chapter 4 used must be wholly obtained.