Confidentiality of information: protection allowed but may be disregarded absent satisfactory independent substantiation. Confidentiality is presumptively maintained for information inherently confidential or submitted as confidential, subject to the provider furnishing a non-confidential summary or reasons why summarisation is impossible; the Director General may disregard confidentiality claims that are unwarranted or where the supplier will not permit public or summary disclosure unless independent sources satisfactorily substantiate the withheld information.