Who is responsible for the 20-minute wait prior to testing?

The responsibility for the 20-minute wait prior to testing falls on the instrument operator. This waiting period is crucial because it allows time to ensure that the individual being tested does not consume any substances that could affect the accuracy of the breath test results. During this time, the operator must observe the subject to prevent them from burping, regurgitating, or introducing any foreign objects into their mouth, all of which could lead to contamination of the breath sample and potentially skew the results.

The operator is trained to manage this waiting period effectively, ensuring that everything is in compliance with the testing protocols. By monitoring the subject during this time, the operator helps to maintain the integrity of the test results, which is critical for legal and evidentiary purposes.