http://www.iowadnr.gov/Portals/idnr/...ementhunts.pdf

different areas , different regs
sometimes there is a shooting test involved
sometimes a meeting

In my area you have to have passed the National bowhunters class, a shooting test and sit in on a meeting with the game warden.

also

http://www.iowadnr.gov/Hunting/DeerH...mentHunts.aspx