D.C. Code § 1-204.47

The Mayor shall implement appropriate procedures to insure that budget, accounting, and personnel control systems and structures are synchronized for budgeting and control purposes on a continuing basis. No employee shall be hired on a full-time or part-time basis unless such position is authorized by act of the Council (or Act of Congress, in the case of a year which is a control year). Employees shall be assigned in accordance with the program, organization, and fund categories specified in the act of the Council (or Act of Congress, in the case of a year which is a control year) authorizing such position. Hiring of temporary employees and temporary employee transfers among programs shall be consistent with applicable acts of the Council (or Acts of Congress, in the case of a year which is a control year) and reprogramming procedures to insure that costs are accurately associated with programs and sources of funding.