What is the test for a rational basis under the Fair Housing Act?

between the disparity of treatment and some legitimate governmental purpose. See Heller v. Doe, 509 U.S. 312, 320 (1993). Under rational-basis review, a legislature "need not actually articulate at any time the purpose or rationale supporting its classification. Instead, a classification must be upheld if there is any reasonably conceivable set of facts that could provide a rational-basis for the classification." Id. (internal quotation marks and string citations omitted). Courts reviewing for a rational basis must accept a legislature's generalizations even when there is an imperfect fit between means and ends; "mathematical nicety" is not required. Id. at 321.

B. The Federal Fair Housing Act (As Amended)