Regulations of the Attorney General Governing the Review and Approval of Title for Federal Land Acquisitions (2016); cf. United States v. City of Tacoma, 330 F.2d 153, 155, n.6 (9th Cir. 1964) (noting Attorney General could not “render . . . a written opinion as to the validity of the Government’s title, without noticing the very serious impediment on that title left undecided by the judgment” of the lower court).