On March 23, 2021, the United States Court of Appeals for the Second Circuit (the “Second Circuit” or the “Court”) agreed with FERC’s determination that the New York State Department of Environmental Conservation (“DEC”) had waived its certification authority under the Clean Water Act (“CWA”) by failing to act within the one-year statutory deadline. Notably, the Second Circuit held that a state agency cannot revise a certification request date by written agreement with the applicant, thereby altering the one-year statutory deadline for state action. Denying the petitions for rehearing by DEC and the Sierra Club, the Court applied the same reasoning it applied in New York State Dep’t of Env’t Conservation v. FERC (“New York I”), 884 F.3d 450, 455-56 (2d Cir. 2018) (see March 20, 2018 edition of the WER) where the Second Circuit determined that DEC could not unilaterally alter the application date based on when it considered an application complete “because that approach would allow a state agency not only to dictate when the review process can begin but also to delay it indefinitely.” There, to avoid such a subjective standard, the Second Circuit established a bright line rule that the beginning of the review is determined by the date “of receipt of such request.”