Letters of Interpretation | Occupational Safety and Health Administration

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

Date	Title	Standard Number	Standard Number
05/06/2019	29 CFR 1926.950(c); Subpart V; CPL 02-00-124; Multi-Employer Citation Policy	1	1926.950
04/19/2019	OSHA Approval of Cr Sampling	2	1910.1026 - Index, 1960.17 - Index
04/03/2019	Clarification on how to count calendar days resulting in days away from work	2	1904 - Table of Contents, 1904.7(b)(3)
03/21/2019	Monitoring options under OSHA's Respirable Crystalline Silica standard	6	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)
03/21/2019	OSHA's Noise Standard as it applies to Supra Aural Phones for audiometric testing	1	1910.95(h)
03/06/2019	Foreign-Flag Vessels.	2	1904 - Table of Contents, 1904.7(b)(3)
03/04/2019	Silica in Construction, Integrated Water Delivery System, Exposure Assessment, Medical Surveillance, Respiratory Protection	3	1926.1153(c)(1), 1926.1153(d)(2)(vi), 1926.1153(h)(1)(i)
01/25/2019	Testing Intervals for Rubber Insulating Gloves	1	1910.137(c)(2)(viii)
01/25/2019	RDS Anchorage Testing Certification	1	1910.27
12/19/2018	Production facilities that recover natural gas liquids may have enforceable PSM-covered processes	3	1910.119, 1910.119(a), 1910.119(b)
12/11/2018	Updated Interim Enforcement Guidance for the Beryllium Standards	3	1910.1024, 1926.1124, 1915.1024
12/03/2018	HCS Labeling requirements regarding intra-plant and intercompany shipping	3	1910.1200(f)(1), 1910.1200(f)(6), 1910.1200(f)(7)
11/29/2018	Occupational Exposure to Beryllium Standard – Dissolvable Laundry Bags for Personal Protective Clothing	4	1910.1024(h)(2)(v), 1910.1024(m)(3), 1910.1200, 1910.1024
11/14/2018	Clarification on the use of cold therapy.	2	1904 - Table of Contents, 1904.7(b)(5)(ii)
11/05/2018	Enforcement Policy - Crane Operator Certification Requirements	2	1926 Subpart CC, 1926.1427
11/02/2018	Enforcement Policy for Respiratory Hazards Not Covered by OSHA Permissible Exposure Limits	1	1910.1200
11/02/2018	Use of Grit- and Water Based Sweeping Compound for Silica	2	1910.1053(h)(1), 1910.1053(f)(1)
10/23/2018	Restriction on using performance option/objective data for repeat monitoring in OSHA’s General Industry Lead and Cadmium standards	4	1910.1025, 1910.1026, 1910.1027, 1910.1053
10/11/2018	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)	1	1904.35(b)(1)(iv)
10/01/2018	[De Minimis] Violation Notices: Blood Laboratory Proficiency Testing and Approval	4	1910.1025, 1910.1025(j)(2)(iii), 1926.62, 1926.62(j)(2)(iii)