National - Specialty Selection

I am Executive, but normally I just reserve a midsize and grab a car from the EA aisle. But reading some of the selection reports, I see mention of the "specialty" selection. Is this the same as the premium? If not, how do you reserve from that selection?

Specialty section consists mostly cars with upgrade charges. Sometimes if you book premium they might let you take cars off that aisle if there are lots of premium cars sitting at that aisle but most likely you need luxury reservation or pay an upgrade charge, I usually ask the greeter and sometimes he/she lets me take cars off there if I have a premium/luxury reservation. Since you are Executive you should take cars off Executive Selection (ES) not the regular Emerald Aisle (EA), most of the time you can find premium cars at the ES lot.