NSW's can be found here:
https://www.service.nsw.gov.au/transaction/apply-for-the-family-energy-rebate-retail-customers
Tl;Dr for eligibility:
- be a NSW resident
-
be the account holder of an energy retailer -
have been the recipient of the Family Tax Benefit (FTB) for the previous financial year and have had your entitlement to the FTB payments finalised by Centrelink -
ensure the person in your household who's registered as the FTB recipient lodges the application. The recipient is the person who receives correspondence on FTB from Services Australia.