What are the different classes of license and age requiremets for each?

In many regions, driver's licenses are categorized into several classes based on the type of vehicle. Typically, a Class A license is for operating heavy trucks and requires the driver to be at least 18 years old, while a Class B license covers larger vehicles like buses and usually has the same age requirement. A Class C license is for standard passenger vehicles and often requires drivers to be at least 16 or 18 years old, depending on local laws. Additionally, there may be learner's permits for younger drivers, generally starting at ages 15 or 16, allowing them to drive under supervision.