D.C. Mun. Regs. tit. 5, r. 5-A3002
The LEA shall ensure that a continuum of alternative placements is available to meet the needs of children with disabilities for special education and related services.
The LEA shall provide the full continuum of alternative placements to accommodate the needs of a child with a disability, regardless of a lack of existing placement options that exist at the time of enrollment or because educating the child with a disability would result in additional costs, administrative inconvenience, or changes to school programming, staff, or schedule.
The LEA's continuum of alternative placements shall include instruction in all of the following environments:
The LEA shall make provision for supplementary aids and services to be provided in conjunction with regular class placement.
D.C. Mun. Regs. tit. 5, r. 5-A3002