Judgment of the General Court (Fifth Chamber) of 20 September 2019.#Federal Republic of Germany v European Chemicals Agency.#REACH – Evaluation of substances – Benpat – Persistence – ECHA decision requesting further information – Article 51(6) of Regulation (EC) No 1907/2006 – Action brought before the Board of Appeal – Task of the Board of Appeal – Adversarial procedure – Nature of review – Intensity of review – Powers of the Board of Appeal – Article 93(3) of Regulation No 1907/2006 – Conferral of powers on EU agencies – Principle of conferral – Principle of subsidiarity – Proportionality – Obligation to state reasons.#Case T-755/17.