I talked to a law enforcement officer a couple years ago (he was camping next to us), and struck up a conversation with him about license plates. It's funny, because he said, as far as the "law" goes, the license plate has to be visible, not blocked. But, on the books, there was no written rule for the placement of the license plate. He said, actually, legally, you could install it upside down. And what was even more surprising, he said it doesn't matter where it's installed, just so it's installed.
I've seen a lot of utility trailers with license plates attached to the tail gate ramp turned side-ways (up and down long ways), stuck in the back of car windows, and even one taped to the trunk of a car because the bumper had been crunched in and there was no place to hang the plate.
I found that quite interesting, but .... this is Indiana ... and we are a little red-neck here you know! :B
Whats legal in your state may differ than what's in my state, but to keep your camper looking nice, you will either need to move the license plate holder higher, which means you may have to move the tail light higher, or find a new spot for the new post. I think I'd rather find a new spot for the post.
Now, I'm pretty sure it is on the books how high the lights can be from the surface of the road, (front and back) as there is for the height of a bumper. So, before moving any running lights, it probably would be best to check with your BMV - DMV.
