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
Clarification of OSHA requirements for dual-rated equipment meeting consensus standards for both aerial lifts and cranes 1926.1400, 1926.453
Whether handling of stones for foundation work is considered a construction activity; Clarification of whether a crane can be derated based on the load being lifted. 1926.32(g), 1926.1441
Sleep-deprivation and fatigue hazards for night shift workers
Clarification of whether the handling of propane tanks is considered construction 1926.1400(c)(17)
Whether unloading a pallet suspended by a crane is considered construction. 1926.1400(c)(17)
Responsible party's address and phone number on SDSs and labels 1910.1200(c)
Obligations of establishments that provide tattoos and body piercing under OSHA's Bloodborne Pathogens Standard 1910.1030(g)(2)
Requirements for labeling of products shipped for export to domestic and international destinations, under the revised Hazard Communication Standard (HCS 2012) 1910.1200(f)(1)(i), 1910.1200(f)(1)(ii), 1910.1200(f)(1)(iii), 1910.1200(f)(1)(iv), 1910.1200(f)(1)(v), 1910.1200(f)(1)(vi)
Exposure to noise during the use of high-velocity dryer nozzles in pet grooming salons 1910.95
Recordkeeping Regulation contained in 29 CFR Part 1904 1904 - Table of Contents, 1904.39(b)(11)
The use of dry down draft tables or benches for collection of metal dust generated during grinding, buffing, and deburring operations
By-product hazard information included in safety data sheet, Section 2 1910.1200, 1910.1200(g)(2)
Recognized and Generally Accepted Good Engineering Practices in Process Safety Management Enforcement 1910.119
RAGAGEP in Process Safety Management Enforcement 1910.119
Definition of a "physician" under 29 CFR 1910.95 and what credentials would qualify a person to perform the duties that are specifically ascribed to physicians by the standard 1910.95(g)(3), 1910.95(g)(9)
Facial hair and respirator fit 1910.134(g)(1)(i)(A), 1910.134(g)(1)
Recording criteria for cases involving occupational hearing loss when employees use hearing protection 1904.5, 1904.10
Regarding setting time restrictions by crane operator testing organizations for crane-certification test. 1926.1427(b), 1926.1418, 1926.1417
Evaluation of chemical exposures in shipyard operations by competent persons 1915.3(c), 1915.4(o), 1915.7
Recordkeeping Regulation contained in 29 CFR Part 1904 1904 - Table of Contents, 1904.7(b)(5)(ii)(F)