One of the most exciting aspects of media law is its dynamic and everevolving nature. It is shaped by the changing nature of communication careers, rapid developments in technologies and the social dynamics of politics, economics and culture. In no period of human history have such changes come about as quickly as in these first two decades of the twenty-first century. We have updated this book to reflect the many changes that have occurred in media law and its interpretation since our last edition in 2015. Our target audience has broadened with each edition as technologies such as the internet and social media have combined to transform journalism and its allied professional communication careers, including public relations, strategic communication, social media management, professional blogging and their many hybrids. While the book is Australian in its orientation, media law is now international in its application as the internet and its resultant communication platforms leave Australian communicators and their employers vulnerable to publishing laws across hundreds of jurisdictions internationally. The book tries to offer a taste of such risks faced by those working internationally, while still detailing the most important restrictions and defences in Australia’s nine jurisdictions at the national, state and territory levels.