D.C. Mun. Regs. tit. 4, r. 4-706
A complainant may request that the complaint be amended at any time prior to a hearing.
If the complainant requests an amendment prior to the issuance of the LOD, the Director shall remand the matter to the investigator for further investigation.
If the complainant requests an amendment after certification to the Commission, the matter shall be remanded back to the Office for further investigation.
When an amendment is filed, the Office shall serve a copy of the amendment upon the respondent within two (2) calendar days of the amendment. The respondent shall, within five (5) calendar days after service, file an answer to the amendment. If more time is needed for answering an amendment, the Office shall grant an extension for a reasonable period of time upon the respondent's written request. Any request for an extension must be filed within the five (5) calendar days after service of the amendment.
If the investigation is completely or nearly complete, a new docket number may be assigned.
D.C. Mun. Regs. tit. 4, r. 4-706