Generally, conference papers are not published in the same way as journal articles. Journal articles have well-established publishing channels with clear guidelines around copyright and licensing.
Conferences organised by large professional organisations such as IEEE usually have a clearly defined policy on the version of the paper that can be made available in an open access repository. For other conferences, check what is allowed in the publisher/author agreement. If a publisher or conference organiser doesn't permit self-archiving or does not specify their position, UNSW authors are encouraged to contact the conference organisers directly to seek clarification or obtain permission to self-archive.
UNSW’s Open Access Policy requires staff and students to deposit peer-reviewed conference papers into UNSWorks within twelve months of publication.