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

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Date Title Standard Number
Storage of flammable liquids and the applicability to the Process Safety Management standard. 1910.119
Interpretation of OSHA requirements for personal protective equipment to be used during marine oil spill emergency response operations 1910.120, 1910.132
Recording injuries and illnesses which occur at other employers' premises. 1904 - Table of Contents
The location and maintenance of OSHA injury and illness records. 1904 - Table of Contents
The applicability of Process Safety Management standard to a 50% solution of Hydroxylamine. 1910.119
A draft fall protection plan written in accordance with 1926.502. 1926.500, 1926.502
The Ciba Self-Medication, Inc. (CSM) facility and the application of OSHA's PSM of Highly Hazardous Chemicals Standard. 1910.119
Concerns with the OSHA June 30 memorandum concerning the application of 29 CFR 1926.652 to house foundation/basement excavations. 1926.652
A letter of compliance from OSHA regarding "HAZCOM" data sheets. 1926.59
Update: OSHA Enforcement Policy for Occupational Exposure to Tuberculosis. 1910.134
Shower requirements for the Lead in Construction Standard. 1910.106, 1926.62
Statement of compliance from OSHA for a pole-mounted powder actuated tool. 1926.302
An interpretation relative to ingressing and egressing an elevated manlift at an elevated level. 1926.556
Clarification on who must receive first responder awareness level training. 1910.120
The use of crane or derrick suspended personnel platforms (CDSPP) during stack and chimney erection. 1926.550
OSHA Tuberculosis Control Training and Resource Guide.
The Canadian Standards Association, a nationally recognized testing laboratory, marking and double insulated tools 1910.399
Fall Protection in the power distribution industry 1910.269, 1926.502
The coverage of child care workers regarding pre-exposure hepatitis B vaccination. 1910.1030
Clarification of the OSHA standard 1926.32 addressing competent persons at construction sites. 1926.32