La. Stat. tit. 3 § 4110
Any authorized representative of the board or of the commissioner shall have access to, and may enter at all reasonable hours, all places of business operated by licensees where bulk milk or dairy products are purchased, stored, processed, manufactured, or sold, or where the licensee maintains books, papers, accounts, records, or other documents related to such activities. The board or the commissioner may subpoena, and any authorized representative of the board or the commissioner may inspect, copy, or audit, any of such books, papers, records, accounts, or documents, all for the purpose of determining whether the licensee is complying with the provisions of this subpart, and with regulations or stabilization plans issued by the board or the commissioner. The authority granted hereinabove shall also extend to books, papers, records, accounts, or other documents of persons doing business with licensees. Any information gained through utilization of the authority granted hereinabove in this section shall be treated as confidential and shall be used only for the administration of this subpart; provided, that such information may be divulged by a person when called upon to testify in any adjudicatory proceeding before the board or the commissioner or in any court proceeding, and provided further, that nothing contained in this subpart shall prevent the use of any information procured by the board or the commissioner in the compiling and dissemination of general statistical data, containing information procured from a number of licensees, and compiled in such manner as not to reveal individual information of any licensee.
La. R.S. § 3:4110