Undiluted (neat) oral fluid.

Undiluted oral fluid. An oral fluid specimen to which no other solid or liquid has been added. For example: A collection device that uses a diluent (or other component, process, or method that modifies the volume of the testable specimen) must collect at least 1 mL of undiluted (neat) oral fluid.

Source

49 CFR § 40.3

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Scoping language

In this part, the terms listed in this section have the following meanings:

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