ADMINISTRATIVE LAW - RIGHT TO INFORMATION -REFUSAL OF ACCESS - DOCUMENTS NONEXISTENT OR UNLOCATABLE - request for applicant’s medical records -whether agency has conducted reasonable searches -whether access to further documents may be refused on the basis they are nonexistent or unlocatable - section 67(1) of the Information Privacy Act 2009 (Qld) and sections 47(3)(e) and 52 of the Right to Information Act 2009 (Qld)