George Williams AO is the Anthony Mason Professor, a Scientia Professor and the Foundation Director of the Gilbert + Tobin Centre of Public Law at the Faculty of Law, University of New South Wales. He is an Australian Research Council Laureate Fellow and has written and edited leading texts including Australian Constitutional Law and Theory and The Oxford Companion to the High Court of Australia. He has also appeared as a barrister in the High Court of Australia in cases on freedom of speech, freedom from racial discrimination, review of government action and the rule of law.

David Hume is a Reader at Six Selborne/Wentworth Chambers. Previously, he worked in the Australian Government Solicitor's Constitutional Litigation Unit representing the Commonwealth in High Court constitutional litigation and as an Associate to Chief Justice Gleeson.