I don't think so. The language of the ToS for your specific eCert would be helpful.

I don't have your exact terms but a quick google trips across these terms which state in the "Restrictions" that

Certainly couldn't hurt to call Amex if you have time but I would anticipate a "no" from them.

Edit: Derp. Just caught that those terms are for the companion cert, so maybe not what you're after. If you have your ToS available and can link that would be helpful