Abstract: This guide provides advice for researchers in applying the principles in the AIATSIS Code of Ethics for Aboriginal and Torres Strait Islander Research (the AIATSIS Code of Ethics or this Code). It is also useful for ethics review bodies to identify practical ways in which the principles should be evident in project design. The best ethical research practice occurs in the partnership, design and planning stages of a project. However, ethical practice permeates every stage of the research process and should be revisited regularly as research proceeds. In addition, where a researcher or community encounters a project that is already underway, it is important to take stock of the ethical underpinnings of the project and adjust as required. In acknowledging this, this Guide to Applying the AIATSIS Code of Ethics for Aboriginal and Torres Strait Islander Research provides practical information on how you may apply the principles in four main stages of your research: 1. getting started 2. implementing your project 3. communicating research results 4. post-project. This Guide is designed to encompass a range of different project methodologies: • quantitative methods (surveys, big data, statistics) • qualitative methods (ethnographic, case studies, interview based) • mixed methods (participatory action, focus groups, workshops) • working with documents (historical, archival, discourse analysis). The Guide offers a range of best practices and ideas for any person engaging in ethical research. For more detailed information specific to particular types of research, for example large surveys, please refer to the supporting case studies on the AIATSIS Ethics webpage.2