I have a question, most likely a dumb one.  I DM a pathfinder game and play in one but I am new in pathfinder society.  My question is this are archetypes that are on the website but not official allowed?  Example: In one of my games have a blacksnake dual whip wielding arcane striking bard.  Is the blacksnake archetype legal?  
I am interested in playing I just had that question before I go building something illegal.