你要的法律条文I-9表上一抬头大黑框“反歧视注意事项”里就有

这事还没有要到file complaint 的地步。
I-9 是每个人受雇必须要填的表，你要的法律条文表上一抬头大黑框“反歧视注意事项”里就有, 打印下来给 HR 一看他就知道了。
"Employer CANNOT specify which document(s) they will accept from an employee. The refusal to hire an individual because of a future expiration date may also constitute illegal discrimination."

链接
http://www.uscis.gov/files/form/i-9.pdf