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
Vehicle-mounted elevating and rotating work platforms standard. 1910 - Table of Contents
Powered platforms permanently dedicated for building maintenance standard. 1910.66
Safety and Health regulations over large dairy farms. 1910 - Table of Contents, 1910.111, 1910.142, 1910.145, 1910.266, 1910.1027, 1910.1200, 1910.1201, 1928 - Table of Contents
Roll-over protective structures for agricultural wheeled tractors. 1928.51
Service workers in the heating, plumbing and air-conditioning industries. 1910 - Table of Contents, 1910.12, 1926.13
Means of Egress. 1910 - Table of Contents
Petition for modification of OSHA's Methylene Chloride Standard 1910.1052
OSHA's Methylene Chloride Standard 1910.1052
OSHA's standard for exposure to bloodborne pathogens. 1910.1030
NIOSH approved respirator during the period of an employee's escape from a chemical release of phosgene. 1910.134(d)(1)(ii)
Sodium Azide as Used in the Manufacturing Process of Automobile Air Bags. 1910.109, 1910.119
OSHA's Methylene Chloride Standard 1910.1052
OSHA's position on U.S. Environmental Protection Agency-approved disinfectants. 1910.1030
Hydrogen fuel that is contained in fuel storage cylinders. 1910.103
OSHA's Hazardous Waste Operations and Emergency Response Standard. 1910.120
Requirements for negative pressure rooms.
OSHA's Fixed Ladders and Safety Cages standard. 1910.27
Clarification o-f the electric power generation, transmission, and distribution standard. 1910.269
Control of hazardous energy (lockout/tagout) standard. 1910.147
Provisions of the Hazard Communication Standard. 1910.1200