in FL, there is a statute that requires you to have it. same with insurance. you must have them in the vehicle.
there is another for insurane.320.0605 Certificate of registration; possession required; exception.—The registration certificate or an official copy thereof, a true copy of a rental or lease agreement issued for a motor vehicle or issued for a replacement vehicle in the same registration period, a temporary receipt printed upon self-initiated electronic renewal of a registration via the Internet, or a cab card issued for a vehicle registered under the International Registration Plan shall, at all times while the vehicle is being used or operated on the roads of this state, be in the possession of the operator thereof or be carried in the vehicle for which issued and shall be exhibited upon demand of any authorized law enforcement officer or any agent of the department, except for a vehicle registered under s. 320.0657. The provisions of this section do not apply during the first 30 days after purchase of a replacement vehicle. A violation of this section is a noncriminal traffic infraction, punishable as a nonmoving violation as provided in chapter 318.
so when I pull you over and ask you for it, you're supposed to have it on your possession.
if they don't ask you, they don't have to. it's not required to ask. I ask because I want to make sure it's on your person.
I can see it on my computer if it's registered anyways (insurance too...)
if all your windows are down, I might ask you to put a window up so I can see the tint level too. doesn't mean I must, but I can. same with the registration. I ask because you should have it on you.
I hope that explains it