D.C. Mun. Regs. tit. 5, r. 5-A5014
OSSE shall establish non-resident tuition rate determinations that reflect the amount necessary to cover all expenses incurred by the District public school as a result of the student's use of the school's services or the amount paid by the District of Columbia to fund the student's services received at a school or educational program with funding provided by the District of Columbia.
Non-resident tuition rate determinations shall include the UPSFF amount, which includes all relevant weights associated with the UPSFF, the per pupil facilities allowance for public charter schools or other OSSE approved allowances as appropriate, and any other supplemental allocations.
OSSE may establish non-resident tuition rate determinations that exceed the UPSFF but shall be the amount necessary to cover all expenses described in Subsection 5014.1.
The rates may be pro-rated to reflect the portion of the school year during which the non-resident student will be enrolled.
D.C. Mun. Regs. tit. 5, r. 5-A5014