"Written permit" refers to a specific document or authorization that is written down, usually on paper, granting permission or approval for someone to do something or go somewhere. Full definition
If the government is so certain the law as currently written permits this appointment, why would any «clarification» be necessary? (canadianlawyermag.com)
You'll take the vision and written permit tests at the DMV in order to get your permit. (aceable.com)
Have the peace of mind knowing you are working on two things at once while learning the Rules of the Road and prepping for your California DMV written permit test. (drivingschool101.com)