Green stickers and red stickers are two different law terminologies. You should have an idea about these terms to carry out the process efficiently. If you are willing to drive your vehicle on public land, you can not do so without a legal pass.
You cannot drive on public land, but you can tackle this situation by acquiring a green sticker. A green sticker is a legal certificate that allows the owner of off-road vehicles to drive their vehicle on public land.
Green stickers are like a green signal for your vehicle to operate on public land. If your vehicle cannot meet the standards of safety established by a particular state, then red stickers would be granted to restrict your activity.