Straight from the Petition for Exemption:
This action reopens the comment period for a Petition for
Exemption that was published on June 12, 2012. The petition for
exemption from Aircraft Owners and Pilots Association (AOPA) and
Experimental Aircraft Association (EAA), if granted, would allow AOPA
and EAA members to conduct certain operations of aircraft without
having to hold an FAA-issued medical certificate.
So...what makes the AOPA and EAA members special? And, more importantly, what were the proposed changes in the first place? Sorry - yes - I don't pay much attention to the GA scene right now, but was looking for some insight into what the original changes were and then why the EAA and AOPA think their members should have some sort of operational benefit without having an FAA Approved medical, for certain operations.