Article 5a 2.

Notwithstanding the obligations laid down in paragraph 1, providers of regulated intra-EU communications may additionally offer, and consumers may expressly choose, a tariff for international communications including regulated intra-EU communications different from that set in accordance with paragraph 1, by virtue of which consumers benefit from a different tariff for regulated intra-EU communications than they would have been accorded in the absence of such a choice. Before consumers choose such a different tariff, the provider of regulated intra-EU communications shall inform them of the nature of the advantages which would thereby be lost.