Final answer:
The minimum license revocation period for a second DWI offense is one year, if it occurs within five years of the first offense.
Step-by-step explanation:
A second DWI offense would result in a minimum one-year license revocation period if the event occurred within five years of the driver's first DWI. Laws and penalties can vary by state due to the powers granted by the Twenty-First Amendment which gave states the authority to regulate alcohol within their jurisdictions. The National Minimum Drinking Age Act of 1984 required states to raise the drinking age to twenty-one or risk a reduction in federal highway funds. This legislation has influenced various state laws on drinking and driving.