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.

Filters


Date Title Standard Number
Clarification of Scope of OSHA Instruction STD 1-12.22 1910.212(a)(3)(ii)
Acceptable use of the presence sensing device 1910.216, 1910.303
Separation of LPG containers from "important buildings" in 1910.110 1910.110(b)(6)(ii)
Work permits in lockout/tagout standard requirements 1910.147
Oregon Interagency Migrant Labor Camp Enforcement Agreement 1975.1
Questions and Answers on the New Penalty System.
Enforcement of the Chromate and Chromic Acid PEL 1910.1000
Use of Blood Carboxyhemoglobin to Document Employee Exposure to Carbon Monoxide
Clarification of OSHA Instruction CPL 2.45B CH-1.
Separate line for a full body harness 1910.27
MSDS requirements for scrap materials 1910.1200(g)
Compliance with 1910.147 using the new Block-Out safety product line. 1910.147
Favorable Review Commission Decision. 1910.1020
Favorable Review Commission Decision. 1915.73(d)
Location of excessive temperature sensors in the grain industry 1910.272
Emergency response in the trucking industry 1910.120, 1910.1200, 1910.120(q)(1), 1910.120(q)(3)(vii), 1910.120(q)(3)(iv), 1910.120(q)(6), 1910.38, 1910.1200(h)
Bolt-together, divided wheels are not considered multi-piece rim wheels 1910.177
Jurisdictional Issue - Southwest Transportation. 1975.1
Occupational noise exposure limits 1910.95(a)
Non-finishing spraying of contact cement to wood or to laminae 1910.107