Yes. Driving on public roads isn't a right, it's a privilege that has to be earned by getting a driver's license. So Police has the right to stop anyone to check if they have a license or not.
Registration.
no way
no but he can issue you a ticket because of it.
There is no such thing as "just cause" when a police officer runs a license tag. It's part of his job to do so. Depending on how busy they may be doing other work police officers may randomly run dozens of license tags a day.
You would be trained for and be a holder of all the licences you require including firearms by the time you complete your Police Officer training.
The police don't have a 'license to kill.' They are, however, authorized to be armed and, if necessary, take a life in protection of their own life, or the life of another. Police shootings are subject to the most SEVERE scrutiny.
license and registration/insurance car ownership papers
Yes they can but its dump.
15 to 20 metre.
The only way to find out who has the driving license number 422 in PA is speak to the DMV or to a police officer.
Any police officer can run your license number for wants or registration. No probable cause is required.
yes