18 Va. Admin. Code § 45-20-5
The words and terms used in this chapter have the following meanings unless the context requires a different meaning:
"Attempting to perform" means any time when a licensee has accepted an assignment to perform any of the duties of his office or job.
"Chemical test," except when applied to testing for the presence of alcohol, means any scientifically recognized test and analyses of an individual's breath, blood, urine, saliva, bodily fluids, hair or tissues for evidence of controlled substances listed in Schedules I through V of the Drug Control Act (§ 54.1-3400 et seq. of the Code of Virginia) or marijuana. The words "chemical test" as used in this chapter in connection with the testing for the presence of alcohol refers to a scientifically recognized test involving saliva or breath.
"Illegal drugs" includes (i) any controlled substance as that term is defined in the Drug Control Act at § 54.1-3401 of the Code of Virginia listed in Schedule I (§ 54.1-3446 of the Code of Virginia) or (ii) those controlled substances illegally acquired listed from Schedules II through V (§§ 54.1-3448, 54.1-3450, 54.1-3452, and 54.1-3454 of the Code of Virginia, respectively). It is the intent of these regulations that in the event the contents of Schedules I through V of the Drug Control Act are changed, that these regulations incorporate such changes at the time those controlled substances are made a part of the Drug Control Act in Virginia.
"Medical review officer" or "MRO" means a Virginia licensed physician with a current valid certification from the American College of Occupational and Environmental Medicine or the American Association of Medical Review Officers whose duties, authorities and responsibilities are delineated by these organizations.
"On duty" means the period of time the licensee is available to receive orders for an assignment.
18 Va. Admin. Code § 45-20-5
Statutory Authority: § 54.1-902 of the Code of Virginia.