I went to the local DMV yesterday to get a plate for my Green stickered 2007 WR450f. I had my forms completed along with a CHP VIN inspection and the dealer's light inspection and my insurance card. I was not sure if I should dual register it or just street register it. The gal at the counter did not have any advice so I went with just a street registration. My installed green sticker is good until next June. I had no issues and walked out with a plate. The reason being is my DRZ400S has just a street registration and no green sticker and I can go anywhere with no questions. It seems a plate supersedes a green sticker and this includes the CA OHV parks that I have been to. My question is what is the purpose or advantage of a dual registration? I support the CA OHV parks with green stickers on 4 other bikes so I feel I have done my part there.