What is the test for establishing that information supplied to a public body is confidential?

[34] If one were to accept the argument that information is confidential merely because when it was supplied to the public body it was endorsed as such, then all third parties dealing with a public body could routinely frustrate the intent of the Act by adding such an endorsement to the information supplied. This point was recognized by Strayer J.) in the case of Ottawa Football Club v. Canada (Minister of Fitness and Amateur Sport), [1989] F.C.J. No. 7, where he stated at page 4: I am satisfied that when individuals, associations, or corporations approach the government for special action in their favour, it is not enough to state that their submission is confidential in order to make it so in an objective sense. Such a principle would surely undermine much of the purpose of this Act which in part is to make available to the public the information upon which government action is taken or refused. Nor would it be consistent with that purpose if a Minister or his officials were able to exempt information from disclosure simply by agreeing when it is submitted that it would be treated as confidential.