Article 80 4.

The national regulatory authority shall also review obligations imposed on the undertaking in accordance with this Article if on the basis of evidence of terms and conditions offered by the undertaking to its downstream customers, the authority concludes that competition problems have arisen or are likely to arise to the detriment of end-users which require the imposition of one or more obligations provided in Article 69, 71, 72 or 74, or the amendment of the obligations imposed in accordance with paragraph 2 of this Article.