Subchapter XII - Customer Service Operations (Part A to Part D)
- Part A - City Wide Call Center. [Repealed] (Section 1-327.01 and Section 1-327.02)
- Part B - Customer Service Operations Unit (Section 1-327.31 to Section 1-327.34)
- Part C - Office of Unified Communications (Section 1-327.51 to Section 1-327.57)
- Part D - D.C. One Card (Section 1-327.71 to Section 1-327.73)