OPINION OF THE COURT
In this case, we consider whether our decision in
People v Todd
(
On November 3, 2007, Constable McCarthy of the Town of Bethel police force observed a minivan parked on the side of a road directly underneath a “no standing” sign. A few minutes later, McCarthy saw defendant Dragan Boscic walk from a nearby convenience store and get into the minivan. As defendant started to drive the minivan forward, McCarthy pulled the police car in front of it and exited the vehicle.
According to McCarthy, when he approached the minivan, he smelled alcohol on defendant’s breath, saw that his eyes were glassy and bloodshot, and noticed that his speech was slightly slurred. McCarthy asked defendant if he had consumed alcohol and defendant admitted to drinking three beers. McCarthy then requested that defendant perform five field sobriety tests. After defendant’s poor performance on some of these tests, he was arrested for suspicion of drunk driving. Later, at the Sullivan County Sheriff’s Office, McCarthy used a breath-alcohol machine—the BAG DataMaster—to test defendant. The device *497 issued a reading indicating that defendant’s blood alcohol level was .07%. Defendant was charged with violating Vehicle and Traffic Law § 1192 (1)—driving while ability impaired by the consumption of alcohol.
During the bench trial in Bethel Justice Court, the People sought to introduce, through the testimony of Constable McCarthy, the results of the breath-alcohol test. As part of the foundation presented in support of the admissibility of the test results, the People offered a police record certifying that the DataMaster had been calibrated (i.e., checked and adjusted by a trained technician) by an employee of the State Division of Criminal Justice Services on April 6, 2007—approximately six months and three weeks before the test was administered to defendant. Defense counsel argued against admission of the test results on the basis that the People failed to lay an adequate foundation, asserting that
People v Todd
(
On appeal, Sullivan County Court reversed and dismissed the accusatory instrument (
Breath-alcohol detection machines have long been considered scientifically reliable, but it remains necessary for the proponent of breath-alcohol test evidence to establish an adequate evidentiary foundation for the admission into evidence of the results of the test
(see e.g. People v Mertz,
The trial evidence in
Todd
indicated that the breathalyzer machine “was constantly left on at the [state police] barracks and never turned off,” and had been calibrated more than six months before it was utilized to test the defendant (
We have not relied on a six-month, bright-line rule in subsequent cases that dealt with the foundation requirements for breath-alcohol evidence. Rather than applying a specific temporal limitation, our
post-Todd
decisions have repeatedly emphasized that the applicable principle is whether the detection instrument was in “proper working order” at the time a test was administered
(People v Gower,
Todd was decided almost 35 years ago and in the ensuing decades, scientific knowledge has advanced dramatically, leading *499 to significant technological changes in breath-alcohol detection devices. The scientific methods incorporated in modern-day breath testing instruments are substantially different from the earlier generations of these devices. For instance, in 1975 when Todd was decided, the prevalent scientific process for breath-alcohol analysis involved chemical oxidation, wherein a breath sample was passed through an ampule containing a chemical mixture (usually potassium dichromate in sulfuric acid). The degree of ethanol content in the breath stimulated changes in the absorption abilities of the solution that could be detected by transmitting light through the sample. Results were then compared with an unreacted sample of the solution to achieve a blood-alcohol concentration reading (see Faigman et al., 5 Modern Scientific Evidence: The Law and Science of Expert Testimony § 41:55; 2 Giannelli and Imwinkelried, Scientific Evidence § 22.03 [b], at 380 [4th ed]). More recent technology relies on infrared absorption spectrometry. This technology— which is used in the BAG DataMaster—calculates blood-alcohol concentration by passing infrared light through a chamber holding the breath sample to gauge the absorption rate of “infrared radiation at specific wavelengths” (Faigman et al., 5 Modern Scientific Evidence: The Law and Science of Expert Testimony § 41:52; see 2 Giannelli and Imwinkelried, Scientific Evidence § 22.03 [b], at 389 [4th ed]; Rose, New York Vehicle and Traffic Law § 35:21 [2d ed]). Given the technological advances that have occurred and will continue to evolve, paired with the proliferation of available breath-alcohol detection devices approved for use by the New York State Department of Health (DOH) (see 10 NYCRR 59.4), * we do not believe that a court-imposed calibration timing rule for all current technologies would be helpful in achieving the primary objective, which is to provide the factfinder a basis to determine whether the particular instrument used produced reliable results in a specific instance. Even if we had articulated a bright-line calibration rule more than three decades ago, the changes in scientific testing methods would have provided reason to revisit it.
It further bears noting that both parties to this litigation recognize that DOH has been charged by the Legislature to evaluate and approve specific models of breath-alcohol testing machines (see Vehicle and Traffic Law § 1194 [4] [c]). In its *500 regulatory capacity, DOH has determined that such instruments must be calibrated “at a frequency as recommended by the device manufacturer” but not less than once a year (10 NYCRR 59.4 [c] [eff Apr. 23, 2010, as amended July 22, 2010]). The promulgation of these regulations will, for arrests occurring after the effective date of the regulations, provide courts with information regarding recommended calibration intervals, not to exceed one year, when assessing the adequacy of foundation requirements for the admissibility of breath-alcohol test results. But here, there is no question that section 59.4 (c) of the regulations—the provision addressing calibration standards—was not effective at the time of defendant’s arrest, and the People do not assert that this regulation supplies the applicable standard in this case.
We therefore rely on our holding that there has been no strict six-month calibration rule pronounced by this Court for breath testing evidence. Our conclusion does not mean that appropriate and adequate calibration procedures can be disregarded by law enforcement. Rather, the admissibility of breath-alcohol analysis results remains premised on the People’s ability to demonstrate, among other requirements, that the device was in “proper working order” when it was used to test an accused
(People v Freeland,
Accordingly, the order of County Court should be reversed and the case remitted to that court for further proceedings in accordance with this opinion.
*501 Chief Judge Lippman and Judges Ciparick, Read, Smith, Pigott and Jones concur.
Order reversed, etc.
Notes
DOH currently lists about 100 different models of breath-alcohol testing devices (including the DataMaster) that are approved for use by law enforcement agencies (see 10 NYCRR 59.4 [b]).
