4. By way of derogation from paragraph 1, point (b), obliged entities shall apply at least customer due diligence measures referred to in Article 20(1), point (a), when carrying out an occasional transaction in cash amounting to a value of at least EUR 3 000, or the equivalent in national currency, whether the transaction is carried out in a single operation or through linked transactions.
The first subparagraph of this paragraph shall not apply where Member States have in place, pursuant to Article 80(2) and (3), a limit to large cash payments of EUR 3 000 or less, or the equivalent in national currency, except in the cases covered by paragraph 4, point (b) of that Article.