(a) A police officer who has reasonable grounds to believe that an individual is or has been driving or attempting to drive a motor vehicle while under the influence of alcohol or while impaired by alcohol may, without making an arrest and prior to the issuance of a citation, request the individual to submit to a preliminary breath test to be administered by the officer using a device approved by the toxicologist in the Department of State Police Forensic Sciences Division. (b) The police officer requesting the preliminary breath test shall advise the person to be tested that neither a refusal to take the test nor the taking of the test shall prevent or require a subsequent chemical test pursuant to § 16-205.1 of this subtitle. (c) The results of the preliminary breath test shall be used as a guide for the police officer in deciding whether an arrest should be made and may not be used as evidence by the State in any court action. The results of the preliminary breath test may be used as evidence by a defendant in a court action. The taking of or refusal to submit to a preliminary breath test is not admissible in evidence in any court action. Any evidence pertaining to a preliminary breath test may not be used in a civil action. (d) Refusal to submit to a preliminary breath test shall not constitute a violation of § 16-205.1 of this subtitle and the taking of a preliminary breath test shall not relieve the individual of the obligation to take the test required under § 16-205.1 of this subtitle if requested to do so by the police officer.
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