Final answer:
Aggravated driving under the influence of alcohol occurs when a person commits a violation of driving under the influence for the second or subsequent time.
Step-by-step explanation:
Aggravated driving under the influence of alcohol occurs when a person commits a violation of driving under the influence for the second or subsequent time. This means that if a person has been previously convicted of driving under the influence, and they are caught driving under the influence again, they can be charged with aggravated driving under the influence.