D.C. Code § 32-531.10a: Statute of limitations.

All civil or administrative complaints brought under this chapter shall be filed within 3 years of the event or final instance of a series of events on which the complaint is based, except the 3-year period shall be tolled for the duration of any period during which the employer does not post the notice required under § 32-531.09, or, for civil complaints, when an administrative complaint is filed.