Once you get assigned to a Ranger unit, you are working as a Ranger. You wont have your tab, and you'll have to work a little harder until you get back from RS, like, say, you may have to run everywhere instead of walk until you get your tab. Whilst at the unit, you do your regular job, if deployment comes, you deploy with them and work along side just like any other member of the unit. Not everyone at a Ranger unit has their tab. Not everyone with their tab is at a Ranger unit. I guess if you are in a Ranger unit, doing Ranger missions or trainings, you are a Ranger. The tab just makes you a more qualified Ranger.... Ranger School is a leadership course more than anything else.