May 2, 2016 - Arizona Republic Article
  Signs: Under Arizona law, an HOA cannot prohibit or regulate temporary open house signs. The only requirements are that the temporary open house signs be industry standard size, and owned or used by the seller or the seller's agent. Also, an HOA is permitted to prohibit open house signs on the common elements of the condominium. 
  Hours: an HOA may not limit the hours for an open house. An HOA can, however, prohibit an open house being held before 8:00 a.m. or after 6:00 p.m.
  Note: For more information, see ARS 33-1261(c)