Louisiana Revised Statutes Tit. 15, § 523. Notice of opposing party and opportunity to cross-examine expert; certification of subpoena request

B. (1) The party against whom such certificate is offered shall be permitted to subpoena on cross-examination a representative of the department. If the subpoena is requested at least five days prior to the commencement of trial or the person subpoenaed responds to the subpoena, the certificate shall not be prima facie proof of the facts shown thereon.

(2) When the attorney for the defendant, or the defendant acting in his own defense, requests that a subpoena issue to a representative of the department, the request shall be in writing and shall contain a certification that the attorney or the defendant intends in good faith to conduct the cross-examination.