WTO notification · TBT
United StatesAdopted, according to its latest notice
Official title
Powered Air Purifying Respirators (PAPRs) in Underground Mines
The United States issued an addendum on 21 October 2026 to the earlier TBT notification G/TBT/N/USA/2224. Addenda often report that a measure was adopted, changed, postponed or withdrawn. The measure was first notified on 10 July 2025. Comments are open until 8 December 2026.
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Powered Air Purifying Respirators (PAPRs); Product and company certification. Conformity assessment; Occupational safety. Industrial hygiene; Respiratory protective devices
Latest notice (G/TBT/N/USA/2224/Add.2, 21 October 2026)
The latest notice says the measure was adopted or published.
Powered Air Purifying Respirators (PAPRs) in Underground Mines
In response to a public request, the Mine Safety and Health Administration (MSHA) is reopening the rulemaking record and is scheduling a virtual public hearing on the Agency's proposed rule published on 1 July 2025 (notified as G/TBT/N/USA/2224), titled, ''Powered Air Purifying Respirators (PAPRs) in Underground Mines.'' MSHA is reopening the comment period for the proposed rule published on 1 July 2025, (90 FR 28406) for additional public comments. All new comments must be received or postmarked by 11:59 p.m. Eastern Time on 8 December 2026. MSHA will hold a fully virtual public hearing on 17 November 2026 to accept comments from the public on the proposed rule. The event will begin at 9:00 a.m. Eastern Time and will end after the last presenter speaks. Those who wish to speak during the virtual public hearing are asked to register at Speakers should register by 11:59 p.m. Eastern Time on 13 November 2026. If you do not register in advance and you wish to speak, you will be called after all those who registered have spoken. 91 Federal Register (FR) 65697, 16 October 2026; Title 30 Code of Federal Regulations (CFR) Parts 57 and 75: This reopening of comment period and previous actions notified under the symbol G/TBT/N/USA/2224 are identified by Docket Number MSHA-2025-0089. The Docket Folder is available on Regulations.gov at and provides access to primary documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket…
Proposed rule; request for comments - MSHA is proposing to allow the use of non-permissible Powered Air Purifying Respirators (PAPRs) in specified underground areas of mines, if the equipment meets certain technical specifications and is operated under specific conditions. This proposed rule would codify technical specifications and working conditions to allow the use of non-permissible PAPRs in underground gassy mines. This proposed rule would reduce burden because mine operators would no longer need to submit a petition for modification to use non-permissible PAPRs.
Every notice about this measure published here, newest first. Each one is the notifying member's own text.
AddendumG/TBT/N/USA/2224/Add.2
Comment deadline: Open until 8 December 2026
Powered Air Purifying Respirators (PAPRs) in Underground Mines
In response to a public request, the Mine Safety and Health Administration (MSHA) is reopening the rulemaking record and is scheduling a virtual public hearing on the Agency's proposed rule published on 1 July 2025 (notified as G/TBT/N/USA/2224), titled, ''Powered Air Purifying Respirators (PAPRs) in Underground Mines.'' MSHA is reopening the comment period for the proposed rule published on 1 July 2025, (90 FR 28406) for additional public comments. All new comments must be received or postmarked by 11:59 p.m. Eastern Time on 8 December 2026. MSHA will hold a fully virtual public hearing on 17 November 2026 to accept comments from the public on the proposed rule. The event will begin at 9:00 a.m. Eastern Time and will end after the last presenter speaks. Those who wish to speak during the virtual public hearing are asked to register at Speakers should register by 11:59 p.m. Eastern Time on 13 November 2026. If you do not register in advance and you wish to speak, you will be called after all those who registered have spoken. 91 Federal Register (FR) 65697, 16 October 2026; Title 30 Code of Federal Regulations (CFR) Parts 57 and 75: This reopening of comment period and previous actions notified under the symbol G/TBT/N/USA/2224 are identified by Docket Number MSHA-2025-0089. The Docket Folder is available on Regulations.gov at and provides access to primary documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket…
AddendumG/TBT/N/USA/2224/Add.1
Comment deadline: Closed on 2 September 2025
Powered Air Purifying Respirators (PAPRs) in Underground Mines
The Mine Safety and Health Administration (MSHA) is extending the comment period on the proposed rule titled, ''Powered Air Purifying Respirators (PAPRs) in Underground Mines,'' published in the Federal Register on 1 July 2025 (notified as G/TBT/N/USA/2224), with an established public comment period that is scheduled to end on 31 July 2025. In response to requests for additional time to develop and submit comments on the proposed rule, MSHA is extending the comment period for an additional 30 days--from 31 July 2025, to 2 September 2025. The comment period for the proposed rule that was published on 1 July 2025, at 90 FR 28406 is extended. All comments must be submitted by midnight Eastern Standard Time on 2 September 2025. 90 Federal Register (FR) 34405, 22 July 2025; Title 30 Code of Federal Regulations (CFR) Parts 57 and 75: This extension of comment period and the proposed rule; request for comment notified as G/TBT/N/USA/2224 are identified by Docket Number MSHA-2025-0089. The Docket Folder is available on Regulations.gov at and provides access to primary documents as well as comments received. Documents are also accessible from Regulations.gov by searching the Docket Number. WTO Members and their stakeholders are asked to submit comments to the USA TBT Enquiry Point by or before 4pm Eastern Time on 2 September 2025. Comments received by the USA TBT Enquiry Point from WTO Members and their stakeholders will be shared with MSHA and will also be submitted to the Docket…
Regular notificationG/TBT/N/USA/2224
Comment deadline: Closed on 31 July 2025
Powered Air Purifying Respirators (PAPRs) in Underground Mines
Proposed rule; request for comments - MSHA is proposing to allow the use of non-permissible Powered Air Purifying Respirators (PAPRs) in specified underground areas of mines, if the equipment meets certain technical specifications and is operated under specific conditions. This proposed rule would codify technical specifications and working conditions to allow the use of non-permissible PAPRs in underground gassy mines. This proposed rule would reduce burden because mine operators would no longer need to submit a petition for modification to use non-permissible PAPRs.
Expodite writes its summary from the official record. The notification and the documents it notifies are on the WTO's own websites.
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