The full answer

While you're not forced to accept every participant, you can't arbitrarily refuse on discriminatory grounds. Legal refusal scenarios: 1) Participant needs are outside your scope (e.g. you only do personal care but they need SIL), 2) You don't have capacity (roster is full), 3) Participant is unsafe or unmanageable after genuine support attempts, 4) Participant or family behaviour is abusive to staff. Process: give written notice (typically 14-28 days), explain the reason, identify and help transition to alternate providers, document everything. You CANNOT refuse based on: disability type, location, race, gender, sexual orientation, religion, or any protected attribute. Be thoughtful here — the NDIS Code of Conduct requires good-faith effort to find solutions before refusing.