D.C. Code § 32-1453.02
An employer shall post a notice in its workplace notifying employees of their rights under this chapter. The notice shall be posted in a conspicuous place in at least one location where employees congregate.
Mar. 11, 2015, D.C. Law 20-219, § 4b
Mar. 5, 2024, D.C. Law 25-138, § 2(d)