In Massachusetts, the statute of limitations for DUI offenses depends on the severity of the offense. Here are the time limits for different types of DUI offenses:

1. Misdemeanor DUI: The statute of limitations for misdemeanor DUI offenses in Massachusetts is generally 6 years. This means that the prosecution must initiate legal proceedings within 6 years from the date of the offense.
2. Felony DUI: For felony DUI offenses, such as DUI causing serious bodily injury or DUI resulting in death, there is no specific statute of limitations. These offenses are considered to be "crimes punishable by imprisonment in the state prison," and there is no time limit for prosecution.

It's important to note that the statute of limitations can vary depending on the specific circumstances of the case and any applicable laws or regulations. It's always best to consult with a legal professional to understand the statute of limitations for a particular DUI offense.

For more information, you can refer to the Massachusetts General Laws, Chapter 277, Section 63 which outlines the statute of limitations for criminal offenses in Massachusetts.

Disclaimer: This information is provided for general informational purposes only and should not be considered legal advice. Please consult with a qualified attorney for legal guidance regarding your specific situation.