D.C. Mun. Regs. tit. 14, § 3902
3902.1 Upon receipt of a petition, the Rent Administrator shall assign a case number to it, using the following prefixes:
DOCUMENT PREFIX
(a) Tenant Petitions TP
(b) Hardship Petitions HP
(c) Capital Improvement Petitions CI
(d) Petitions for Substantial Rehabilitation SR
(e) Petitions for Changes in Related Services and Facilities SF
(f) Case numbers for Voluntary Agreements shall be indicated with the prefix VA
(g) Case numbers for Show Cause hearings shall be indicated with the prefix SC
(h) Case numbers for Compliance hearings shall be indicated with the word "COMPLIANCE"
3902.2 The Rent Administrator shall enter the receipt and acceptance of each petition in a docket, which shall list the petition number, the address of the affected housing accommodation or rental unit, and the date on which the petition is scheduled to be heard before a hearing examiner.
3902.3 Upon receipt of a petition, the Rent Administrator shall, by first class mail, notify the adverse parties named in the petition of their right to a hearing.
3902.4 In the case of tenant petitions, a copy of the petition shall be sent to the housing provider of the housing accommodation.
3902.5 In the case of petitions filed by a housing provider, the housing provider shall provide for each tenant in the housing accommodation one (1) copy of the petition, and a postage paid envelope addressed to each tenant by name which contains the return address of the RACD. The copies shall be mailed to the tenants by the Rent Administrator.
SOURCE: Notice of Final Rulemaking published at 33 DCR 1336, 1352-53 (March 7, 1986).