What does the 90-day period for driver's license renewal refer to?

[StevenRose]

Driver's license renewal within 90 days refers to the requirement that motor vehicle drivers should apply for license renewal at the vehicle management office of the issuing authority within 90 days before the expiration of their current driver's license. When applying, they must fill out the "Motor Vehicle Driver's License Application Form". Renewal materials: Bring two copies of ID card, two recent 1-inch color photos without hats, original ID card, original driver's license, and a medical examination certificate from a county-level or above hospital (free medical examination is also available at the vehicle management office). Renewal process: The motor vehicle driver submits the required materials to the vehicle management office of the issuing authority for license renewal. The vehicle management office will process the renewal within one working day after review. If the driver's license has expired for less than one year, it can be renewed normally; if it has expired for more than one year but less than three years, the license will be canceled, but it can be renewed by passing the subject one test; if it has expired for more than three years, the license will be invalid and cannot be renewed.