D.C. Code § 47-1805.02a
Sections 8003 and 8004 of D.C. Law 19-21 provided:
"Sec. 8003. Review of impact of combined reporting.
"After 2 full years of tax reporting have occurred under the combined reporting requirements imposed by section 8002, the Chief Financial Officer shall determine the economic effects of these requirements on affected taxpayers.
"Sec. 8004. Applicability. This subtitle shall apply for taxable years beginning after December 31, 2010."
Applicability of D.C. Law 20-61: Section 7103 of D.C. Law 20-61 provided that § 7102 of the act shall apply for taxable years beginning after December 31, 2010.