Which of the following is NOT a responsibility assigned to certified operators?

The responsibility of leading public information sessions is not a typical duty assigned to certified operators of the Intoxilyzer 9000. Certified operators are primarily focused on conducting chemical tests, overseeing instrument calibration, and ensuring compliance with regulations related to the use and accuracy of the breath testing equipment.

Conducting chemical tests is a core responsibility, as certified operators must accurately administer breath tests and interpret the results. Overseeing instrument calibration is also essential, as it ensures the accuracy and reliability of the test results, which is crucial for legal and safety purposes. Ensuring compliance with regulations is fundamental to maintaining the integrity of the testing process and protecting the rights of individuals being tested.

While public information sessions may be beneficial to educate the community about impaired driving and the technology, it falls outside the scope of primary responsibilities for certified operators, making it the correct choice in this context.