The board shall maintain as a closed and confidential record, not subject to discovery unless the person provides written consent for disclosure, all personal information about any individual preneed purchaser or beneficiary, including but not limited to name, address, Social Security number, financial institution account numbers, and any health information disclosed in the preneed contract or any document prepared in conjunction with the preneed contract; provided, however, that the board may disclose such confidential information without the consent of the person involved in the course of voluntary interstate exchange of information; or in the course of any litigation concerning that person or the provider, seller, or sales agent involved with the preneed contract; or pursuant to a lawful request or to other administrative or law enforcement agencies acting within the scope of their statutory authority. In any such litigation, the board and its attorneys shall take reasonable precautions to ensure the protection of such information from disclosure to the public.