The Rottnest Island Authority manages the gas supply to Rottnest Island.The Rottnest Island Authority has had an exemption from holding a licence since 1 January 2002. File Attachment Expand All | Collapse All Documents Document Exemption Order 0.12 MB 29 Dec 2006 Name Apply Filter A AGL (GTL14) Alinta (GTL9) Amanda Energy (GTL15) ATCO (GDL8) E ENGIE (GTL16) K Kleenheat (GTL10) O Origin Energy (GTL13) P Perth Energy (GTL12) R Rottnest Island Authority S Supagas (GDL9) (GTL18) Synergy (GTL8)