(a) Money in an account assigned to a student under § 29.045 may be used only for supplemental special education services and supplemental special education instructional materials.
(b) Supplemental special education services must be provided by an agency-approved provider.

(c) If the agency has approved vendors for a category of instructional material under § 29.047, instructional materials must be purchased from an agency-approved vendor for that category of instructional material. If the agency does not establish criteria for agency approval for a category of instructional materials, money in the student’s account may be used to purchase the instructional materials from any vendor.