D.C. Mun. Regs. tit. 18, § 1399
When used in this chapter, the following terms shall have the meanings ascribed, notwithstanding any definition in Section 9901:
Authorized Law Enforcement Official - any member of the District of Columbia Metropolitan Police Department, the U.S. Park Police, or the U.S. Capitol Police, who is duly authorized to enforce traffic laws within the boundaries of the District of Columbia.
Chemical Test - a test of a person's blood, urine, or breath for the purpose of determining the alcohol concentration or blood-drug-content in accordance with D.C. Official Code §§ 50-1902 and 50-1903, except the alcohol concentration shall be 0.04 grams per 100 milliliters of blood, per 210 liters of breath, or per 67 milliliters of urine instead of 0.10 grams per 100 milliliters of blood, per 210 liters of breath, or per 67 milliliters of urine.
Commerce - (a) any trade, traffic or transportation within the jurisdiction of the United States between a place in a state and a place outside of the state, including a place outside of the United States; and (b) any trade, traffic, and transportation in the United States which affects any trade, traffic and transportation described in part (a) of this definition.
Commercial Driver's Instruction License - a driver's license issued by the District of Columbia or another jurisdiction, in accordance with the federal regulations, 49 CFR Part 383, to an individual which authorizes the individual to operate a class of commercial vehicles, if the individual:
(a) Possesses a non-commercial driver's license, or a commercial driver's license for a group of vehicles other than the group of vehicles the individual is applying; and
(b) Is accompanied by a person who is authorized to operate the type of commercial vehicle being driven.
Commercial Driver's License - a driver's license issued by the District of Columbia or other jurisdiction, in accordance with the federal regulations, 49 CFR Part 383, to an individual which
authorizes the individual to operate a class of commercial vehicle.
Conviction - means an unvacated adjudication of guilt, or a determination that a person has violated or failed to comply with the law in a court of original jurisdiction or by an authorized administrative tribunal, an unvacated forfeiture of bail or collateral deposited to secure the person's appearance in court, a plea of guilty or nolo contendere accepted by the court, the payment of a fine or court cost, or violation of a condition of release without bail, regardless of whether or not the penalty is rebated, suspended, or probated.
Department – the Department of Motor Vehicles
School bus - a Commercial Motor Vehicle used to transport pre-primary, primary, or secondary school students from home to school, from school to home, or to and from school-sponsored events. School bus does not include a bus used as a common carrier.
1399.2
Any other term not defined above shall have the same meaning as that prescribed in 49 CFR 383 and 391.
SOURCE: Final Rulemaking published at 51 DCR 10913 (November 26, 2004); as amended by as amended by Final Rulemaking published at 53 DCR 2206 (March 24, 2006); as amended by D.C. Act published at 53 DCR 8675 (October 27, 2006); as amended by Notice of Final Rulemaking published at 57 DCR 10912, 10916 (November 19, 2010).