premise: 4. There shall be no liability for disclosure or use of Confidential Information which is  (a) in the public domain through no fault of the receiving party  (b) rightfully received from a third party without any obligation of confidentiality,  (c) rightfully known to the receiving party without any limitation on use or disclosure prior to its receipt from the disclosing party,  (d) independently developed by the receiving party,  (e) generally made available to third parties without any restriction on disclosure, or  (f) communicated in response to a valid order by a court or other governmental body, as otherwise required by law, or as necessary to establish the rights of either party under this Agreement (provided that the party so disclosing has provided the other party with a reasonable opportunity to seek protective legal treatment for such Confidential Information).