Section 37-2745 - BURDEN OF PROOF - LIABILITIES(a) It is not necessary for the state to negate any exemption or exception in this act in any complaint, information, indictment or other pleading or in any trial, hearing, or other proceeding under the provisions of this act. The burden of proof of any exemption or exception is upon the person claiming it.(b) In the absence of proof that a person is the duly authorized holder of an appropriate registration, valid prescription, or order form issued under the provisions of this act, he is presumed not to be the holder of the registration, valid prescription or form. The burden of proof is upon him to rebut the presumption.(c) In all prosecutions under the provisions of this act involving the analysis of a controlled substance or a sample thereof, a certified copy of the analytical report with the notarized signature of the bureau chief of the Idaho forensic laboratory and the criminalist who conducted the analysis shall be accepted as prima facie evidence of the results of the analytical findings.(d) Notwithstanding any statute or rule to the contrary, the defendant may subpoena the criminalist to testify at the preliminary hearing and trial of the issue at no cost to the defendant.(e) No liability is imposed under the provisions of this act upon any authorized state, county or municipal officer, engaged in the lawful performance of his duties.[I.C., sec. 37-2745, as added by 1971, ch. 215, sec. 1, p. 939; am. 1972, ch. 133, sec. 12, p. 261; am. 1993, ch. 158, sec. 1, p. 408.]