Today I saw another way to make it clear that you want a party to waive the implied duty of good faith:
Shipper, at its sole discretion and not subject to a reasonableness standard, may determine whether the goods may be salvaged, and if salvageable, the value of such salvage.
For reasons I explain in MSCD and in this 2011 article, I’m not a fan of waiving the implied duty of good faith, although it’s an option available in some jurisdictions. Saying And we can be as unreasonable as we wanna be! be isn’t a good look, particularly if what’s at stake is an issue you could address directly.