D.C. Mun. Regs. tit. 19, § 1200
1200.1 Whenever used in this chapter, the term “tour guide” or “sightseeing tour guide” shall mean any person who engages primarily in the business of guiding or directing people to any place or point of interest in the District.
1200.2 Whenever used in this chapter, the term “sightseeing tour company” shall mean a business that employs a sightseeing tour guide.
SOURCE: Final Rulemaking published at 57 DCR 6116 (July 16, 2010); as amended by Final Rulemaking published at 62 DCR 10687 (August 7, 2015).