# Issuance of Final Guidance Publication
**AGENCY:**
National Institute for Occupational Safety and Health (NIOSH) of the Centers for Disease Control and Prevention (CDC), Department of Health and Human Services (HHS).
**ACTION:**
Notice of issuance of final guidance publication.
**SUMMARY:**
The National Institute for Occupational Safety and Health (NIOSH) of the Centers for Disease Control and Prevention (CDC), announces the availability of the following publication: “Current Intelligence Bulletin 66—Derivation of Immediately Dangerous to Life or Health (IDLH) Values” [NIOSH 2014-100].
**ADDRESSES:**
This document may be obtained at the following link: *www.cdc.gov/niosh/docs/2014-100/.*
**FOR FURTHER INFORMATION CONTACT:**
G. Scott Dotson, Ph.D. CIH, NIOSH Education and Information Division, Taft Laboratories Building, 4676 Columbia Parkway, Cincinnati, Ohio, 45226. (513) 533-8540.
Dated: November 1, 2013.
John Howard,
Director, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention.