The public interest test (PIT) enables decisions to be made on a case-by-case basis on where the balance between disclosing or withholding information lies.
It must be used when considering whether or not information should be withheld under an FOI qualified exemption or any exceptions of the EIRs.
The provision of the PIT recognises that, although a particular interest may sometimes be harmed by disclosure (and is therefore protected by an exemption or exception), when other, broader, factors are taken into consideration, the greater public interest is served by release. The underlying assumption is that information can be released unless the public interest in withholding can be shown to be greater than the public interest in release.