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.

NOTICE:

How to Request a Letter of Interpretation

Filters


Date Title Standard Number
Rollover protective structures for material handling equipment 1926.1000
Time and resources needed to comply with Lab Standard is justifiable 1910.1450
Occupational exposure to psittacosis and OSHA's enforcement activity to protect exposed employees.
Extension Cords Connected to Permanent Wiring of a Construction Site Building 1926.404(b)(1)
Definition of Reasonable Diligence as stated in 1910.1096(d)(1). 1910.1096
Retesting when audiogram shows employees have suffered STS shift 1910.95(g)(7)(ii)
Self-centering controls will be required on overhead bridge and container handling gantry cranes only. 1917.45
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
Work permits in lockout/tagout standard requirements 1910.147
Separation of LPG containers from "important buildings" in 1910.110 1910.110(b)(6)(ii)
Oregon Interagency Migrant Labor Camp Enforcement Agreement 1975.1
Use of Blood Carboxyhemoglobin to Document Employee Exposure to Carbon Monoxide
Questions and Answers on the New Penalty System.
Enforcement of the Chromate and Chromic Acid PEL 1910.1000
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. 1915.73(d)