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In January 1998, OSHA published the final Respiratory Protection Standard (29 CFR 1910.134). In the final revised respirator standard, OSHA established a mechanism to accept new fit test protocols under Mandatory Appendix A. Any person may submit to OSHA an application for approval of a new fit test protocol, and if the application meets certain criteria, OSHA will initiate a rulemaking proceeding under 6(b)(7) of the OSH Act to determine whether to list the new protocol as an approved fit test protocol in appendix A. OSHA has received a submission to consider three new quantitative fit test protocols that reduce the time required to complete the fit test while maintaining acceptable test sensitivity, specificity, and predictive value. This rulemaking action evaluates the efficacy of the submitted fit test protocols and, if appropriate, will adopt them in appendix A of the standard.