49 C.F.R. § 195.503
Abnormal operating condition means a condition identified by the operator that may indicate a malfunction of a component or deviation from normal operations that may:
(b) Result in a hazard(s) to persons, property, or the environment.
Evaluation means a process, established and documented by the operator, to determine an individual's ability to perform a covered task by any of the following:
(d) Observation during:
(e) Other forms of assessment.
Qualified means that an individual has been evaluated and can:
[Amdt. 195-67, 64 FR 46866, Aug. 27, 1999, as amended by Amdt. 195-72, 66 FR 43524, Aug. 20, 2001]