Case T-805/17: Judgment of the General Court of 3 October 2019 – BASF v ECHA (REACH — Article 11 of Regulation (EC) No 1907/2006 — Article 3(3) of Implementing Regulation (EU) 2016/9 — Requirement for joint submission of data — Joint submission with possibility of a complete opt-out — Administrative practice of ECHA requiring an agreement on the terms for making a joint submission with the lead registrant for a registered substance — Failure to reach an agreement — Dispute resolution mechanism applied by analogy — Decision granting access to a joint submission — Legal basis — Broad discretion of ECHA — Manifest error of assessment — Obligation to state reasons — Legal certainty)