This Technical Supplement provides additional guidance for proponents and practitioners using the Social Impact Assessment Guideline for State Significant Projects (the SIA Guideline)1 . It contains information to help: • Section 2: identify, evaluate and assess the significance of negative and positive social impacts • Section 3: develop appropriate responses to predicted social impacts, with two worked examples of social impact evaluation and response • Section 4: develop a social impact monitoring and management framework, with a worked example of a monitoring mechanism • Section 5: consider the requirements for data validation.