Final answer:
If a driver refuses to take a chemical test during a DUI investigation, their license can be revoked for a period which typically starts from one year for first-time refusals, but can be longer depending on the state and number of refusals.
Step-by-step explanation:
If you refuse to take a chemical test, such as a breathalyzer or blood test, during a DUI investigation, your driver's license can be revoked. The duration for which your license will be revoked varies by state. In many states, a first-time refusal can lead to a license revocation for one year, while repeat refusals can result in longer periods. It is important to be aware of your state's specific implied consent laws, as the penalties for refusal can change based on local legislation. Generally, these laws stipulate that by driving on public roads, you have consented to chemical testing if suspected of driving under the influence (DUI). Refusal to submit to such testing usually results in immediate penalties, including license revocation.