| Contributing firm | Author(s) |
| Australia | |
| Allens Arthur Robinson | Anthony Patten |
| Santos Ltd | Christian Paech | Canada |
| Fraser Milner Casgrain LLP | Vivek Bakshi | England |
| Allen & Overy LLP | Jose Cofre |
| Mark Levy | |
| Matthew Townsend | |
| Paul Griffin | |
| Ashurst LLP | Peter Roberts |
| Philip Thomson | |
| Energy Transact LLP | David Gardner |
| Herbert Smith LLP | James Baily |
| Paula Hodges | |
| King & Spalding International LLP | Garry Pegg |
| Linklaters LLP | James M Douglass |
| Tullow Oil plc | Joanna Kay | Italy |
| Eni SpA | Steven Paul Barra | Netherlands |
| Shell International BV | Matthew Griffiths | Singapore |
| Dart Energy Ltd | Toby Hewitt | United Arab Emirates |
| King & Spalding LLP | Philip R Weems | USA |
| Chevron Global Gas | Donna J Bailey |
| Gary D Henderson | |
| ConocoPhillips Company | Harry W Sullivan Jr |