1. A supervisory authority concerned shall make a request to the lead supervisory authority under Article 61 of Regulation (EU) 2016/679, Article 62 of Regulation (EU) 2016/679, or both, where, following the comments of supervisory authorities concerned pursuant to Article 9(3) , a supervisory authority concerned disagrees with the assessment of the lead supervisory authority on:

(a) the scope of the investigation in complaint-based cases, including the provisions of Regulation (EU) 2016/679 concerned by the alleged infringement which will be investigated;

(b) preliminary orientation in relation to complex legal assessments identified by the lead supervisory authority pursuant to Article 9(2), point(c);

(c) preliminary orientation in relation to complex technological assessments identified by the lead supervisory authority pursuant to Article 9(2), point (c).

2. The request under paragraph 1 shall be made within two months of the expiry of the period referred to in Article 9(3) .

3. The lead supervisory authority shall engage with the supervisory authorities concerned on the basis of their comments on the summary of key issues, and, where applicable, in response to requests under Article 61 and 62 of Regulation (EU) 2016/679, in an endeavour to reach a consensus. The consensus shall be used as a basis for the lead supervisory authority to continue the investigation and draft the preliminary findings or, where applicable, provide the supervisory authority with which the complaint was lodged with its reasoning for the purposes of Article 11(2) .