(a) Except as provided in § 15-140s or subsection (d) of this section, in any criminal prosecution for the violation of § 15-132a, subsection (d) of § 15-133, § 15-140l or 15-140n or subsection (b) of § 53-206d, evidence respecting the amount of alcohol or drug in the defendant‘s blood or urine at the time of the alleged offense, as shown by a chemical test of the defendant’s breath, blood or urine shall be admissible and competent provided: (1) The defendant was afforded a reasonable opportunity to telephone an attorney prior to the performance of the test and consented to the taking of the test upon which such analysis is made; (2) a true copy of the report of the test result was mailed to or personally delivered to the defendant within twenty-four hours or by the end of the next regular business day, after such result was known, whichever is later; (3) the test was performed by or at the direction of a certified law enforcement officer according to methods and with equipment approved by the Department of Emergency Services and Public Protection, and if a blood test was performed, it was performed on a blood sample taken by a person licensed to practice medicine and surgery in this state, a qualified laboratory technician, an emergency medical technician II or a registered nurse in accordance with the regulations adopted under subsection (b) of this section; (4) the device used for such test was checked for accuracy in accordance with the regulations adopted under subsection (b) of this section; (5) an additional chemical test of the same type was performed at least ten minutes after the initial test was performed or, if requested by the peace officer for reasonable cause, an additional chemical test of a different type was performed, including a test to detect the presence of a drug or drugs other than or in addition to alcohol, except that the results of the initial test shall not be inadmissible under this subsection if reasonable efforts were made to have such additional test performed in accordance with the conditions set forth in this subsection and (A) such additional test was not performed or was not performed within a reasonable time, or (B) the results of such additional test are not admissible for failure to meet a condition set forth in this subsection; and (6) evidence is presented that the test was commenced within two hours of operation of the vessel or expert testimony establishes the reliability of a test commenced beyond two hours of operation of the vessel. In any prosecution under this section, it shall be a rebuttable presumption that the results of such chemical analysis establish the ratio of alcohol in the blood of the defendant at the time of the alleged offense, except that if the results of the additional test indicate that the ratio of alcohol in the blood of such defendant is ten-hundredths of one per cent or less of alcohol, by weight, and is higher than the results of the first test, evidence shall be presented that demonstrates that the test results and the analysis thereof accurately indicate the blood alcohol content at the time of the alleged offense.

(b) The Commissioner of Emergency Services and Public Protection shall ascertain the reliability of each method and type of device offered for chemical testing and analysis of blood, of breath and of urine and certify those methods and types which the Commissioner of Emergency Services and Public Protection finds suitable for use in testing and analysis of blood, breath and urine, respectively, in this state. The Commissioner of Emergency Services and Public Protection, after consultation with the Commissioner of Public Health, shall adopt regulations, in accordance with chapter 54, governing the conduct of chemical tests, the operation and use of chemical test devices and the training and certification of operators of such devices and the drawing or obtaining of blood, breath or urine samples as the Commissioner of Emergency Services and Public Protection finds necessary to protect the health and safety of persons who submit to chemical tests and to insure reasonable accuracy in testing results. Such regulations shall not require recertification of a peace officer solely because such officer terminates such officer’s employment with the law enforcement agency for which certification was originally issued and commences employment with another such agency.

(c) If a person is charged with a violation of § 15-132a, subsection (d) of § 15-133 or § 15-140l or 15-140n, the charge may not be reduced, nolled or dismissed unless the prosecuting authority states in open court such prosecutor’s reasons for the reduction, nolle or dismissal.

(d) (1) In any criminal prosecution for a violation of § 15-132a, subsection (d) of § 15-133 or § 15-140l or 15-140n, evidence that the defendant refused to submit to a blood, breath or urine test or the nontestimonial portion of a drug influence evaluation requested in accordance with § 15-140q shall be admissible provided the requirements of subsection (a) of said section have been satisfied. If a case involving a violation of § 15-132a, subsection (d) of § 15-133 or § 15-140l or 15-140n is tried to a jury, the court shall instruct the jury as to any inference that may or may not be drawn from the defendant’s refusal to submit to a blood, breath or urine test or evaluation.

(2) In any prosecution for a violation of subsection (a) of this section in which it is alleged that the defendant’s operation of a vessel was impaired, in whole or in part, by consumption of cannabis, as defined in § 21a-420, the court may take judicial notice that the ingestion of cannabis (A) can impair a person’s ability to operate a vessel; (B) can cause impairment of motor function, reaction time, tracking ability, cognitive attention, decision-making, judgment, perception, peripheral vision, impulse control or memory; and (C) does not enhance a person’s ability to safely operate a vessel.