premise: Receiver may disclose Confidential Information if the same: (a) was generally available at the time it was disclosed other than as a result of a disclosure made by Receiver; (b) was known to the Receiver at the time it received such information, as evidenced by contemporaneous documentation in Receiver’s files; (c) is disclosed with the prior written approval of VIDAR; (d) becomes known to Receiver on a non-confidential basis from a source other than VIDAR without breach of this Agreement by Receiver;