Florida Statutes Title XLVI. Crimes § 790.157. Presumption of impairment; testing methods

(1) It is unlawful and punishable as provided in s. 790.151 for any person who is under the influence of alcoholic beverages or controlled substances, when affected to the extent that his or her normal faculties are impaired, to use a firearm in this state.

(2) Upon the trial of any civil or criminal action or proceeding arising out of acts alleged to have been committed by any person while using a firearm while under the influence of alcoholic beverages or controlled substances, when affected to the extent that his or her normal faculties were impaired or to the extent that the person was deprived of full possession of his or her normal faculties, the results of any test administered in accordance with s. 790.153 or s. 790.155 and this section shall be admissible into evidence when otherwise admissible, and the amount of alcohol in the person's blood at the time alleged, as shown by chemical analysis of the person's blood or chemical or physical analysis of the person's breath, shall give rise to the following presumptions:

(3) A chemical analysis of a person's blood to determine its alcoholic content or a chemical or physical analysis of a person's breath, in order to be considered valid under the provisions of this section, must have been performed substantially in accordance with methods approved by the Florida Department of Law Enforcement and by an individual possessing a valid permit issued by the department for this purpose. Any insubstantial differences between approved techniques and actual testing procedures in an individual case shall not render the test or test results invalid. The Florida Department of Law Enforcement may approve satisfactory techniques or methods, ascertain the qualification and competence of individuals to conduct such analyses, and issue permits which shall be subject to termination or revocation in accordance with rules adopted by the department.

(4) Any person charged with using a firearm while under the influence of alcoholic beverages or controlled substances to the extent that his or her normal faculties were impaired, whether in a municipality or not, shall be entitled to trial by jury according to the Florida Rules of Criminal Procedure.