Calibration of breathalizers

Question: How often must law enforcement, calibrate their breathalyzers, in the state of California?
Answer: Pursuant to Title Code 17, Breath machines should be checked for accuracy within 10 days or 150 subjects (using that machine) whichever comes first. Call me if you would like to discuss this issue further, as well as other issues and defenses that arise with breath machines giving false high readings.
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Sincerely,
Phil Hache
DUI & Criminal Defense Lawyer