Does a Jeep have to have mirrors to be street legal in Oregon?

I was going to take the doors off of my girlfriend's jeep but the mirrors are bolted onto them. I know there are mirrors that you can buy and attach to the windshield/hood but recently I've noticed a few jeeps driving around with the doors off and no mirrors so I was wondering if that is legal or not to do in Oregon. Thanks!|||You need a mirror on the driver's side in all of the 50 states.