I've been able to get bulkhead seating assigned ahead of time without a problem for the past few months since I got injured. Today, when I tried to get my seat, the agent told me that it was blocked and I could not get it until 24 hours beforehand. I told him that I realized if someone needed it more than I, I could be booted (which I've been told) but that I've been able to get it assigned. He said the FAA gave them very strict guidelines and that only quadripalegic or legally blind could be preassigned. This is the first time in probably 40 flights I've heard this. Does this seem correct? Thanks, in advance.