25.505—Employment criteria.
         A recipient shall not administer or operate any test or other criterion for any employment opportunity that has a disproportionately adverse effect on persons on the basis of sex unless:
    
    
        
        (a) 
         Use of such test or other criterion is shown to predict validly successful performance in the position in question; and
    
    
        
        (b) 
         Alternative tests or criteria for such purpose, which do not have such disproportionately adverse effect, are shown to be unavailable.