I have no interest in a debate on this subject. I merely offered a relevant datum, and you've come up with an interpretation which you think explains it away. I see no need to challenge your view.
Another possible way of looking at it is to say the Police are not "the public." The act says the info must not be disclosed to the public. Presumably the Police are part of the same governmental structure as the librarian. Therefore, information could be released to the police without it being considered a public release. Just a possibility I post for others to consider.