Tex. Education Code § 12.1163

(a) To the extent consistent with this section, the commissioner may audit the records of:

(1) an open-enrollment charter school;

(2) a charter holder; and

(3) a management company.

(b) An audit under Subsection (a) must be limited to matters directly related to the management or operation of an open-enrollment charter school, including any financial and administrative records.

(c) Unless the commissioner has specific cause to conduct an additional audit, the commissioner may not conduct more than one on-site audit during any fiscal year, including any financial and administrative records. For purposes of this subsection, an audit of a charter holder or management company associated with an open-enrollment charter school is not considered an audit of the school.

(d) If the aggregate amount of all transactions between a charter holder and a related party, as defined by commissioner rule adopted under Section 12.1166, exceeds $5,000, an audit under Subsection (a) may include the review of any real property transactions between the charter holder and the related party. If the commissioner determines that a transaction with a related party using funds received under Section 12.106 was structured in a manner that did not benefit the open-enrollment charter school or that the transaction was in excess of fair market value, the commissioner may order that the transaction be reclassified or that other action be taken as necessary to protect the school's interests. Failure to comply with the commissioner's order is a material violation of the charter.