34 CFR § 300.141 - Requirement that funds not benefit a private school.
(a) An LEA may not use funds provided under section 611 or 619 of the Act to finance the existing level of instruction in a private school or to otherwise benefit the private school.
(b) The LEA must use funds provided under Part B of the Act to meet the special education and related services needs of parentally-placed private school children with disabilities, but not for meeting—
(1) The needs of a private school; or
(2) The general needs of the students enrolled in the private school.
The following state regulations pages link to this page.