MSHA plans revisions to silica implementation provisions
The U.S. Mine Safety and Health Administration's August 2026 regulatory agenda describes planned revisions to the stayed silica rule, including monitoring, respiratory protection and medical surveillance. The agenda does not establish an enacted amendment or a new compliance date.
The listed work is planned rulemaking. No published proposal for this revision was verified.
- Legal status
- Regulatory agenda; no enacted amendment established
- Source check
- Sep 17, 2026
- Topic
- Respirable crystalline silica
- Technical review
- Jiaxi · 2026-09-23
What changed
Previous requirement
2024 rule subject to stay.
New requirement or current position
Agency plans clarification of exposure monitoring, methods of compliance, respiratory protection and medical surveillance.
Who it affects
- Mining
Dates and milestones
Commencement and compliance dates can differ. Read the conditions beside each date, including any stay or local adoption requirement.
- Announcement or publication
- Aug 14, 2026
- Recorded effective date
- Not established or not applicable
What this could mean for your IH program
Advisory interpretation: Monitor RIN 1219-AC22 separately from the 2024 rule. Agenda target dates do not establish a proposal publication or compliance deadline.
Confirm applicability with a qualified practitioner before changing your program.
Questions and qualifications
- No published proposal for RIN 1219-AC22 was verified. The older RIN 1219-AB36 proposal concerns the earlier rulemaking and does not establish the planned revision.
Source evidence
- 2026 Unified Agenda
Federal Register / MSHA · Printed p.52892, entry 102, RIN 1219-AC22; PDF p.101
August 14, 2026 agenda still describes silica enforcement as paused and plans revisions to monitoring, compliance, respirators and surveillance; agenda dates are estimates, not enacted deadlines.
- Silica: delay of effective date of conforming amendments
MSHA / Federal Register · 91 FR 17143-17144; Dates; Background; Indefinite Delay
April 11, 2025 Eighth Circuit stay covers compliance deadlines. April 6, 2026 notice indefinitely delays conforming amendments; existing 56.5001, 56.5005, 57.5001 and 57.5005 remain enforced.
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