What authority does the Supreme Court have on the Fourteenth Amendment?

Washington v. Davis, supra, 426 U.S. 229, 96 S.Ct. 2040, 48 L.Ed.2d 597, appears to be the controlling Fourteenth Amendment authority on the immediate issue. In that case, as above noted and as in the case at hand, there was no " 'intentional discrimination or purposeful discriminatory acts,' " but instead a claim that a police department employment test had " 'a highly discriminatory impact in screening out black candidates.' " (P. 235, 96 S.Ct. at p. 2045.) Giving effect, arguendo, to that claim the high court found no Fourteenth Amendment or other abridgment. We repeat, for emphasis, some of its conclusions: