Alabama Code Title 12. Courts § 12-21-302

(a) The party against whom the certificate is offered may request, not later than 30 days prior to the commencement of the hearing or trial, a hearing to show cause why a subpoena should be issued for cross-examination of the person who performed the examination or analysis.

(b) The request shall be in writing and shall contain a certification that the requesting party intends in good faith to conduct the cross-examination. The request shall also include a statement of the basis upon which the requesting party intends to challenge the findings contained in the certificate of analysis. The court shall grant the request for subpoena only for good cause shown. Good cause shall not include a challenge to the findings contained in the certificate of analysis, unless the requesting party first establishes a legitimate basis for the challenge. If the request for subpoena is granted, and the requesting party subsequently fails to conduct the cross-examination previously certified to, the court shall assess against the requesting party, all necessary and reasonable expenses incurred for the attendance in court of the certifying witness.