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A drug test (also often toxicology screen or tox screen) is a technical analysis of a biological specimen, for example urine, hair, blood, breath, sweat, or oral fluid/saliva—to determine the presence or absence of specified parent drugs or their metabolites.
The walk-and-turn test is composed of two phases: the Instruction Phase and Walking Phase. During the test, the individual is directed to take nine steps along a straight line. The individual is supposed to walk heel to toe, and while looking down at a real or imaginary line, count the steps out loud. The test subject's arms must remain at ...
Most cannabis drug tests yield a positive result when the concentration of THC-COOH in urine exceeds 50 ng/mL. [10] Urine testing is an immunoassay based test on the principle of competitive binding. Drugs which may be present in the urine specimen compete against their respective drug conjugate for binding sites on their specific antibody.
However, the United States Supreme Court ruled in Skinner that random drug testing is permissible for employees in safety sensitive positions. Justice Kennedy, speaking for the majority, wrote: [T]he Government interest in testing without a showing of individualized suspicion is compelling.
A Drug Recognition Expert (DRE) is a law enforcement officer trained in a scientifically validated method to identify people whose driving is impaired by drugs other than, or in addition to, alcohol. All DREs follow the same 12 step procedure called a Drug Influence Evaluation (DIE), to purportedly determine which category of drugs is causing ...
On July 28, 2014, the United States House of Representatives passed the Essential Transportation Worker Identification Credential Assessment Act (H.R. 3202; 113th Congress), a bill that would direct the United States Department of Homeland Security to assess the effectiveness of the Transportation Worker Identification Credential program. [17]
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