D.C. Mun. Regs. tit. 5-A, § 2805
2805.1 Nonpublic special education schools or programs that serve District of Columbia students with disabilities shall provide special education and related services in accordance with the student's IEP and afford the student all of the rights he or she would have if served by a public agency.
2805.2 Nonpublic special education schools or programs that serve District of Columbia students with disabilities shall ensure instructional alignment with the District of Columbia's learning standards, grades, promotion, and graduation requirements, consistent with Title 5 of the DCMR, including compliance with any amendments to these respective policies, procedures and rules.
2805.3 Nonpublic special education schools or programs shall ensure all students are appropriately included in the statewide assessment, either by taking the statewide general assessment or an alternate assessment approved by OSSE, in accordance with guidelines established by OSSE.
Source: Final Rulemaking published at 57 DCR 9444, 9449 (October 8, 2010).