The provisions of this section extend to any right, duty, or liability declared by this Act which may be lawfully modified by agreement.

本条各项规定，可以扩大到本法规定的经协议合法修改的任何权利、义务或责任。

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So long as you act in good faith and without discrimination, you can lawfully act on your best available information, even if it turns out to be wrong.

FORBES: Employers, Know Your Rights!