Letters of Interpretation

OSHA requirements are set by statute, standards, and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Each letter constitutes OSHA's interpretation of the requirements discussed.

Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information.

These letters of interpretation and the standards they address may not apply to OSHA State Plans. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or additional requirements. Please see OSHA-approved State Plans for more information.

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How to Request a Letter of Interpretation

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Date Title Standard Number
29 CFR 1926.950(c); Subpart V; CPL 02-00-124; Multi-Employer Citation Policy 1926.950
Clarification on rigging for hoisting multiple bundles of construction materials 1926.251, 1926.753(e), 1926.1425(c)
OSHA Approval of Cr Sampling 1910.1026 - Index, 1960.17 - Index
Clarification on how to count calendar days resulting in days away from work 1904 - Table of Contents, 1904.7(b)(3)
Monitoring options under OSHA's Respirable Crystalline Silica standard 1910.1053, 1910.1053(d)(2), 1910.1053(d)(3)(iv), 1910.1053(d)(4), 1910.1053(d)(6)(ii), 1910.1053(g)(1)(iii)
OSHA's Noise Standard as it applies to Supra Aural Phones for audiometric testing 1910.95(h)
Foreign-Flag Vessels. 1904 - Table of Contents, 1904.7(b)(3)
Silica in Construction, Integrated Water Delivery System, Exposure Assessment, Medical Surveillance, Respiratory Protection 1926.1153(c)(1), 1926.1153(d)(2)(vi), 1926.1153(h)(1)(i)
Testing Intervals for Rubber Insulating Gloves 1910.137(c)(2)(viii)
RDS Anchorage Testing Certification 1910.27
Production facilities that recover natural gas liquids may have enforceable PSM-covered processes 1910.119, 1910.119(a), 1910.119(b)
Updated Interim Enforcement Guidance for the Beryllium Standards 1910.1024, 1926.1124, 1915.1024
HCS Labeling requirements regarding intra-plant and intercompany shipping 1910.1200(f)(1), 1910.1200(f)(6), 1910.1200(f)(7)
Occupational Exposure to Beryllium Standard – Dissolvable Laundry Bags for Personal Protective Clothing 1910.1024(h)(2)(v), 1910.1024(m)(3), 1910.1200, 1910.1024
Clarification on the use of cold therapy. 1904 - Table of Contents, 1904.7(b)(5)(ii)
Enforcement Policy - Crane Operator Certification Requirements 1926 Subpart CC, 1926.1427
Enforcement Policy for Respiratory Hazards Not Covered by OSHA Permissible Exposure Limits 1910.1200
Use of Grit- and Water Based Sweeping Compound for Silica 1910.1053(h)(1), 1910.1053(f)(1)
Restriction on using performance option/objective data for repeat monitoring in OSHA’s General Industry Lead and Cadmium standards 1910.1025, 1910.1026, 1910.1027, 1910.1053
Clarification of OSHA's Position on Workplace Safety Incentive Programs and Post-Incident Drug Testing Under 29 C.F.R. §1904.35(b)(1)(iv) 1904.35(b)(1)(iv)