Huppenthal collecting signatures?

by David Safier
I'd only heard about this second hand, so I didn't post about it, but now the Arizona Guardian has an article saying,

Sen. John Huppenthal has been collecting signatures for a campaign for Superintendent of Public Instruction in violation of state election law.

I don't have one of those pricey subscriptions to the Guardian, so I can't give you details. But my second hand source told me about a friend seeing Huppenthal walking around with signature petitions. This creates a bit of a problem for him. He can form an exploratory committee while he's still in office, but he can't actively campaign for office until his current term is a year from expiration.

Anyone have more information on this?