It’s not clear to me that the AI itself will refuse. You could build a system where AI is asked if an image matches a pattern. The true/false is fed to a differ

It’s not clear to me that the AI itself will refuse. You could build a system where AI is asked if an image matches a pattern. The true/false is fed to a different system to fire a missile. Building such a system would violate the contract, but doesn’t prevent such a thing from being built if you don’t mind breaking a contract.