| Supreme Court Brief of NGSA, Electric Power Supply Association and Western Power Trading Forum: Case of Merrill Lynch, Pierce, Fenner and Smith, et al v. Greg Manning | September 10, 2015 |
| NGSA Federal Reserve Comments on Bank Capital Requirements - Environmental Liability | December 15, 2016 |
| NGSA Second Circuit Intervenor Brief in Support of FERC on the Constitution Pipeline Proceeding | September 12, 2016 |
| Reply of NGSA in Support of Motion to Intervene in Second Circuit on Constitution Pipeline Proceeding | March 18, 2016 |
| NGSA Constitution Pipeline Amicus Brief Provided To The Supreme Court | February 20, 2018 |
| NGSA Comments On NYPSC ZEC Proposal | July 21, 2016 |
| NGSA CLNG - DOE RFI Comments | July 14, 2017 |
| NGSA API Second Circuit Amicus Brief on New York ZECs | October 20, 2017 |
| NGSA And Other Industry Groups Letter To Leader McConnell And Leader Schumer Supporting The Confirmation Of Nominees | August 3, 2017 |
| NGSA DOE Comments Fossil Fuel Ban in New/Renovated Federal Buildings | December 15, 2014 |
| NGSA Comments On New Source Performance Standards | May 9, 2014 |
| NGSA Comments on EPA Carbon Pollution Emission Guidelines for Existing Sources | December 1, 2014 |
| Amicus Brief Filed by NGSA and Other Customer and Industry Groups Supporting Northern Access Project in U.S. Court of Appeals Second Circuit | July 7, 2017 |
| NGSA Motion to Intervene in Second Circuit on Constitution Pipeline Proceeding | March 8, 2016 |
| NGSA Comments to Department of Energy on LNG Exports | February 25, 2013 |
| NGSA Supreme Court Amicus Brief (With INGAA and IPAA) In Re Western States Wholesale Natural Gas Antitrust Litigation | September 25, 2014 |
| NGSA Letter to New York State DEC Regarding New Market Project | September 13, 2016 |
| Natural Gas Industry Comments to OMB on EIA Production Survey Expansion 2014 | September 25, 2014 |
| NGSA Amicus Brief In 7th Circuit Asking For Reversal On Illinois ZECs | September 6, 2017 |
| NGSA Filing On NY Public Service Commission's 2016 Clean Energy Standard Staff White Paper | March 15, 2016 |
| NGSA Comments on EPA Proposed Methane Regulations | December 4, 2015 |
| Joint Industry Letter to Department of Energy on Smart Grid and Natural Gas | November 1, 2010 |
| Amicus Brief Filed by NAM with NGSA and Other Customer and Industry Groups Supporting Constitution Pipeline in U.S. Court of Appeals Second Circuit | July 20, 2016 |
| NGSA Letter to Department of Energy on Full-Fuel-Cycle Measurement | October 19, 2010 |
| NGSA Comments to CFTC on Proposed Derivatives Market Rules | September 28, 2010 |
| NGSA Comments to EPA on GHG Reporting Rule | June 10, 2010 |
| Joint Letter to EPA on Potential Impact of Proposed Tailoring Rule | January 21, 2010 |
| Joint Association Letter to Senate on OTC Derivatives Oversight | January 19, 2010 |
| Letter to EPA Requesting Greenhouse Gas Reporting Rule Extension | December 23, 2009 |
| Joint Energy Coalition Letter to Congress Opposing Mandatory Clearing | December 9, 2009 |
| NGSA Comments to CFTC on Whether Certain Contracts Meet SPDC Function | October 26, 2009 |
| Coalition of Energy Derivatives End-users: Statement on Proposed Reform of Over-the-Counter Derivatives Markets | October 7, 2009 |
| NGSA, INGAA and IPAMS Letter to Western Governors | July 21, 2009 |
| Supreme Court Brief with EPSA on Mobile-Sierra Doctrine's Application to Third Parties | July 14, 2009 |
| Comments of the Natural Gas Supply Association Regarding EPA's GHG Reporting Rule (ID No. EPA-HQ-OAR-2008-0508) | June 9, 2009 |
| EPSA & NGSA's Supreme Court Amicus Brief in Case on Mobile-Sierra | December 10, 2008 |
| Supreme Court Amicus Brief on Islander East Pipeline v. Connecticut Case with NGSA, INGAA and AGA | October 23, 2008 |
| Shell and NGSA Amicus Brief on Force Majeure | July 11, 2008 |
