Parties to an employment agreement can not avoid the duty to perform the contract honestly by including language in the agreement that says the duty of honest contractual performance simply does not apply. (torkinmanes.com)
The duty of good faith contractual performance means that a party to a contract will not seek to undermine the other party's legitimate interests in bad faith. (thelitigator.ca)
This is a general doctrine of contract law that imposes as a contractual minimum a standard of honest contractual performance. (thelitigator.ca)