A registration office manages driving tests and issues driver's licenses. Any person who wants a driver's license

must have a unique SSN and a registered address. He$/$ she should pass a knowledge test at any branch in his$/$her

city. An office has an address $($street number, city & postal code$),$ a phone number and unique id$.$ If the person

passed the knowledge test, then a learner's license with a unique license number is issued. The person may take

his$/$her road test at any office any time before the learner's license expiry date. If he$/$she passes the road test, the

office issues him$/$her a driver's license with a unique license number. Driver license can have different

restrictions & classes that are not included in the learner license.