D.C. Mun. Regs. tit. 9, r. 9-2009
At least thirty (30) days before a scheduled (or rescheduled) hearing, the Commission shall provide OTR by hand or electronic delivery a copy of the petition (and/or supplemental petition) together with all attached documents relating to the appeal and the hearing notice.
Except as provided in § 2009.4, OTR shall file a response to the petition with the Commission at least seven (7) days before the scheduled hearing or at least ten (10) days before the scheduled hearing in a case involving single-family residential property.
In a case involving a single-family residential property, OTR shall send the response electronically or by postal mail to the petitioner at least ten (10) days before the hearing. In other cases, OTR shall make the response available to the petitioner for inspection and copying at least seven (7) days before the hearing.
OTR need not respond to the petition if its worksheet was mailed to the petitioner with the Notice of Final Determination ("Notice") and if the Notice affirmed the proposed assessment. In such cases, the worksheet shall be deemed the response of OTR and the response shall not be required to be filed by OTR with the Commission before the hearing.
If the proposed assessment is amended by OTR, the amended assessment must be filed with the Commission by the time set forth in § 2009.2 and must be sent or made available to the petitioner in the same manner and in the same time frame as set forth in § 2009.3.
Appeals of Notices of Final Determination by the Department of Consumer and Regulatory Affairs (DCRA) issued pursuant to D.C. Official Code §§ 42-3131.15 (2012 Supp.) or a Notice of Final Determination by DCRA issued under D.C. Official Code § 47-813 (d-1)(4)(A) (2012 Supp.) shall be made in accordance with applicable law with DCRA as the responsible agency, and any supplemental filing shall be provided to the Commission and to DCRA. A response from DCRA shall be available for inspection at least seven (7) days before the scheduled hearing, and DCRA shall have the authority to make any redeterminations of vacancy and blight and any reclassifications that may be necessary to correct a substantial error that would cause an injustice to the owner for the immediately succeeding, current, or preceding three (3) tax years. Any amended response by DCRA must comply with the time schedule specified in this paragraph.
The Commission shall render a decision on DCRA appeals within one hundred twenty (120) days of the filing of a petition challenging a final determination.
D.C. Mun. Regs. tit. 9, r. 9-2009