It should be easy enough to tell if you should have them. If you are outfitted for them, there will two little silver metal strap fittings on the upper front edge of the box where the top of the U tube drops into. There would also be two metal "wings" with pockets on the sides of the A-frame where the other end of the U-tube drops into.
I don't have my 1007 anymore with these hoops, but someone might be able to post a picture of what the fittings look like. If your 1206 has the fittings, then it should probably have the supports.
Like @36fire412, ours only seemed to support the bed when pulling out. The two straight bars seemed to take all the weight once installed. It is possible though that the bed sagged down enough in the middle to touch them again once we were in bed. I don't think I would be flexible enough to check that.
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2011 Jayco X19H (purchased 2015)
2008 Jayco 1007 PUP (purchased new, traded for the X19)
2018 Nissan Titan Midnight Ed.
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