Watson v. Iowa Dep't of Transp.
Annotate this CaseThe Iowa Department of Transportation (IDOT) suspended a commercial driver's license (CDL) for one year for operation of a commercial motor vehicle with an alcohol concentration of .04 or more. The driver contested the suspension on the ground that the IDOT had erred in concluding that in the CDL context, breathalyzer test results are not to be adjusted for the breathalyzer test's recognized margin of error. The district court and court of appeals affirmed the IDOT decision. The Supreme Court affirmed, holding that there was no indication in the structure or language of the relevant statutes that the legislature intended that a breathalyzer test result be adjusted by the recognized margin of error in making an alcohol concentration determination for the purpose of CDL suspensions.
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