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
Use of insert earphones for audiometric testing. 1910.95(h)(2)
Procedure for maintaining and retaining the OSHA Log. 1904 - Table of Contents
Proper recording on the OSHA Log of Occupational Injuries and Illnesses. 1904 - Table of Contents
Employee exposure to hazardous chemicals while working around small sensors. 1910.1200
Enforcement of ventilation requirements for welding operations. 1910.252(c)
Unit dose syringes. 1910.1030
All electrical equipment must be approved. 1910.399
Mineral oil and/or petrolatum containing skin care products and latex gloves. 1910.1030
Exposure monitoring requirements. 1910.1001
HHCs as it applies to Hydrocarbon fuels used solely for workplace consumption. 1910.119
Work relationship of an injury occurring on the company premises. 1904 - Table of Contents
Determination of the proper date of injury or illness for OSHA recordkeeping purposes. 1904 - Table of Contents
Recordability of cases involving the use of a hand held massager. 1904 - Table of Contents
Willful violations for lack of general training in construction. 1903 - Table of Contents, 1926.21
Air quality at a construction site.
Standard railing specifications.
MSDS requirements for drugs 1910.1200
Clarification of the definition of a permit-required confined space (permit space). 1910.146
Labeling requirements for Formaldehyde when used as an insecticide 1910.1048
Extension cord grounding continuity requirements. 1926.404(b)(1)(iii)(D), 1926.404(b)(1)(iii)(E), 1926.404(b)(1)(iii)(G)