What's needed, for security reasons, are separate elevator lobbies to access the commercial space, and in the past that would have meant a separate bank of elevators too...
...but with modern destination dispatch technology, elevators serving the top floor restaurant can serve residential floors too on normal runs, as the tech allows for an elevator taking diners to be dispatched to the restaurant only while blocking stops on the condo levels. A separate lobby at ground level can stops diners from getting on an elevator that will serve residents.
I'll be interested to see how they manage this here, but my bet is that they use what was otherwise simply going to be a corridor at ground level between the two banks of elevators (seen below, just south of the MID-BLOCK CONNECTION label), as the restaurant elevator access (just make openings in the concrete walls for whichever ones they want to use). Someone entering from the central corridor would get an elevator that will only open again once it reaches the 106th floor, whereas residents would enter from the east elevator doors off of the high-rise lobby for a regular run to the condo floors. Whether the elevators are serving restaurant guests or residents can vary depending upon demand.
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