The presence of jewelry in the mouth is a violation of the requirement that the oral cavity be empty in order to properly perform evidentiary breath testing.
Foreign objects can contain alcohol, sequester alcohol, or contain small amounts particulate matter that contains alcohol and be dislodged with the forced expiration required of evidentiary breath testing. The alcohol or particulate matter containing alcohol when dislodged contaminates the breath specimen such that the results are falsely elevated.
Mouth jewelry must be removed prior to evidentiary breath testing.
{Breath test}