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U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Pipeline Special Permits and State Waivers Overview

Special Permits

A special permit (previously called a waiver) is an order that waives or modifies compliance with a regulatory requirement if the pipeline operator requesting it demonstrates the need and PHMSA determines that granting a special permit would be consistent with pipeline safety. Special permits are authorized by statute in 49 USC § 60118(c) and the application process is set forth in 49 CFR 190.341. PHMSA performs extensive technical analysis on special permit applications and typically conditions a grant of a special permit on the performance of alternative measures that will provide an equal or greater level of safety. PHMSA is committed to public involvement and transparency in special permit proceedings and publishes notice of every special permit application received in the Federal Register for comment.

For assistance with pipeline special permits or the application process, send an email to pipelinespecialpermits@dot.gov. For inquiries related to hazardous materials special permits, send an email to specialpermits@dot.gov.

For background information on general and emergency special permits, please refer to the following documents:.

State Waivers

A state waiver is similar to a special permit, except that it waives or modifies compliance with a regulation adopted by the state pursuant to its participation in the pipeline safety program under a certification authorized by 49 USC § 60105 or an agreement authorized by 49 USC § 60106. Prior to issuing a state waiver, the state is required to provide PHMSA with a 60 day review period.

For assistance with state waivers or the application process, send an email to PHMSAOPSStateWaivers@dot.gov.

Federal Register Notices Related to Special Permit Applications

 
Federal Register (FR) Notices Description Publish Date Comment Period
End Date
PHMSA-2023-0136 Class Location Nov 24, 2025 Dec 24, 2025
PHMSA-2025-1073 Liquefied Natural Gas Nov 20, 2025 Dec 22, 2025
PHMSA-2017-0161 Extension Nov 13, 2025 Dec 15, 2025
PHMSA-2020-0007 Extension Oct 30, 2025 Dec 1, 2025
PHMSA-2025-0011 Extension Oct 14, 2025 Nov 20, 2025
PHMSA-2023-0001 Extension Oct 10, 2025 Oct 27, 2025
PHMSA-2022-0035 Extension Oct 10, 2025 Oct 27, 2025
PHMSA-2019-0202 Extension Oct 10, 2025 Oct 27, 2025
PHMSA-2019-0152 Extension Oct 10, 2025 Oct 27, 2025
PHMSA-2016-0006 Extension Oct 10, 2025 Oct 27, 2025
PHMSA-2016-0004 Extension Oct 10, 2025 Oct 27, 2025
PHMSA-2008-0066 Extension Oct 10, 2025 Oct 27, 2025
PHMSA-2006-24058 Extension Oct 10, 2025 Oct 27, 2025
PHMSA-2023-0114 Vacuum Jacketed (VJ) Piping  Sep 3, 2025 Oct 3, 2025
PHMSA-2024-0011 Valve Spacing Oct 30, 2024 Nov 29, 2024
PHMSA-2024-0055 Class Location Oct 15, 2024 Nov 14, 2024
PHMSA-2023-0071 Odorization Mar 1, 2024 Mar 31, 2024