Final answer:
Upon a second DUI conviction in Tennessee, a driver will be sentenced to at least 45 days in jail.
Step-by-step explanation:
Upon his or her second DUI conviction, a TN driver will be sentenced to at least 45 days in jail. The length of the jail sentence can vary depending on the specific circumstances and the judge's discretion, but a minimum of 45 days is typically imposed. It is important to note that DUI laws can vary by state, so it is advisable to consult the specific laws and regulations of the state in question.