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
06/24/1994	MSDSs must be distributed to customer with shipment of chemical.	1910.1200
04/27/1994	Occupational health hazards to veterinarians.	1910.1000, 1910.1200, 1910.1030, 1910.101
04/26/1994	HAZWOPER and Asbestos standards apply to any emergency response to an uncontrolled hazardous substance release involving the presence of asbestos.	1910.120, 1926.1101
03/31/1994	Hazard Communication Standard (HCS) requirements.	1910.1200
02/17/1994	Material Safety Data Sheet (MSDS) provisions.	1910.1200
02/09/1994	Labeling provisions.	1910.1200
02/03/1994	Employers' responsibilities towards temporary employees.	1910.1200
02/02/1994	Hazard determination for carcinogenic compounds	1910.1200
02/02/1994	Labels and hazard warnings.	1910.1200
02/01/1994	Hazard Communication Standard and Material Safety Data Sheets.	1910.1200
01/31/1994	Members of a HAZMAT team.	1910.120
01/03/1994	Hazard communication standard and pharmaceuticals	1910.1200, 1910.1200(b)(6)(v), 1910.1200(b)(6)(vi), 1910.1200(b)(6)(viii), 1910.1200(g)(1)
01/03/1994	Release of hazardous chemicals from gas calibration bottles.	1910.1200
12/22/1993	The Occupational Safety and Health Administration's (OSHA) Hazard Communication Standard as they apply to veterinary drugs.	1910.1200
11/04/1993	Hazard evaluation of mixtures containing established mutagens.	1910.1200
09/13/1993	Requirement of name, address and telephone number on an MSDS.	1910.1200
09/13/1993	FDA regulated drugs that pose a hazard would be covered by the HCS.	1910.1200
09/07/1993	Requirement for additional employee training whenever new hazards are identified.	1910.1200
09/03/1993	Solvents classified as a combustible liquid on the basis of the MSDS	1910.1200(d), 1910.1200(g)
08/31/1993	Employee exposure to hazardous chemicals while working around small sensors.	1910.1200