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U.S. Code of Federal Regulations
Regulations most recently checked for updates: Aug 27, 2025
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Title 49
Chapter II
Part 219
Subpart E - Subpart E—Reasonable Cause Testing
§ 219.401 - Authorization for reasonable cause testing.
§ 219.403 - Requirements for reasonable cause testing.
§ 219.405 - Documentation requirements.
§ 219.407 - Prompt specimen collection; time limitations.
§ 219.409 - Limitations on authority.
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