Last season, at the Riverside Launch ramp, there was a Nevada Dept. of Wildlife officer, and had his ticket book filling it out, on a pair of jet skis ahead of me. (They had NV tags)
Officer looked at me, (AZ tags) and waived me around.
Found out later the AIS isn't needed for AZ tagged boats-
From NV dept of wildlife:
"Arizona registered watercraft are exempt from the purchase of Nevada’s AIS Decal for the interstate waters of Lake Mead, Lake Mohave and the lower Colorado River. All other waters of the State of Nevada require an AIS Decal for Arizona registered watercraft."
For the CA guys- Ya need it, at least at the river.
"California registered watercraft are exempt from the purchase of Nevada’s AIS decal for the interstate waters of Lake Tahoe and Topaz Lake. All other waters of the State of Nevada require an AIS Decal for California registered watercraft."
http://www.ndow.org/Boat/Aquatic_Invasive_Species/Decal_Information/Dan'l