42 U.S.C. § 2000c-9Section
§ 2000c–9. Classification and assignment
Nothing in this subchapter shall prohibit classification and assignment for reasons other than race, color, religion, sex or national origin.
(Pub. L. 88–352, title IV, §410, July 2, 1964, 78 Stat. 249; Pub. L. 92–318, title IX, §906(a), June 23, 1972, 86 Stat. 375.)