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Proposed rule.

The U.S. Department of Transportation (DOT) is proposing to revise its drug and alcohol testing procedures final rule published on May 2, 2023, to provide temporary qualification requirements for mock oral fluid monitors, provide for consistent privacy requirements by identifying which individuals may be present during an oral fluid collection, and clarify how collectors are to specify that a sufficient volume of oral fluid was collected. In the "Rules and Regulations" section of this issue of the Federal Register, DOT is simultaneously publishing the revision of DOT's drug testing regulation as a direct final rule without a prior proposed rule. If DOT receives no adverse comment, it will not take further action on this proposed rule.

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