6. Where the re-use of data cannot be allowed in accordance with the obligations laid down in paragraphs 3 and 4 of this Article and there is no legal basis for transmitting the data under Regulation (EU) 2016/679, the public sector body shall make best efforts, in accordance with Union and national law, to provide assistance to potential re-users in seeking consent of the data subjects or permission from the data holders whose rights and interests may be affected by such re-use, where it is feasible without a disproportionate burden on the public sector body. Where it provides such assistance, the public sector body may be assisted by the competent bodies referred to in Article 7(1).