This has huge ramifications for a lawyer in terms of the law of conflicts of interest, the ethical duty of confidentiality and the client's substantive right of solicitor - client privilege. (slaw.ca)
It does not create for them new substantive rights that others do not enjoy. (humanrights.gov.au)
But, for pretty much every other document, this is a question of proof and does not change substantive rights. (law.stackexchange.com)