Rules, codes or protocols to facilitate public discussion or debate are scarce, but there are many which apply to particular institutional or private contexts, e.g. in universities, seminars, workshops, business meetings and so on.
This short post on Ground Rules for a Successful Town Hall Style Meeting comes close. Rapoport's rules via Daniel Dennett set out an ideal, if not practical code for public discussion. NYU guidelines for respectful philosophical discussion are relevant but again not a practical for present purposes.
Civil Discourse Organisations
(based in or with activities in Brisbane)
The Australian Institute for Progress AIP - a member- and donor-funded think tank based on classical liberal principles, with generally centre right policy positions
TJ Ryan Foundation - progressive think tank focusing on Queensland public policy
The Centre for Independent Studies CIS - Sydney-based centre-right think tank which conducts some events in Brisbane
Committee for Economic Development of Australia CEDA – is an independent, corporate and institutional membership-based think tank which conducts some events in Brisbane
The McKell Institute Queensland - progressive think tank conducting mostly boardroom discussions and briefings for policy makers, union and corporate executives
Academies and Professional Organisations
Public Discussion Forums
The Ethics Centre, Sydney, has conducted quarterly Oxford-style adversarial debates co-branded with Intelligence Squared and numerous smaller events.
The Wheeler Centre, Melbourne
Institute for Arts and Ideas, London - biannual festivals of discussion and music, now online
Intelligence Squared, London, Oxford-style debates and now a variety of online formats
Intelligence Squared US, New York - Oxford-style debates, diversifying into various online formats
Soho Forum, New York - one-on-one debates between libertarians
The Munk Debates, Toronto - Oxford-style debates, diversifying into various online formats