March 11 was the deadline for parties to submit a petition to be recognized in Arizona. This year the state requires 20,449 valid signatures. The Green Party is the only party that turned in a petition. That petition contained 29,015 signatures. UPDATE: the 29,015 figure is an updated and accurate total. When this post was originally put up earlier today, it said 26,000, but that was not accurate.
The Libertarian Party has not needed to submit a petition in Arizona since 1994, because it keeps its registration above two-thirds of 1% of the statewide registration total.
This 2010 Green Party petition is the first time since 1994 that any party has turned in a petition in Arizona in a mid-term year.