No, it is not required. The majority of the people were dressed in resort casual (khaki pants, nice button down or golf shirt, ladies in dresses/sundresses).
There are some who do "dress for dinner".
Have the Study of Duck and to drink have the "Emeril Sky".
"no sandals or open toe sandals. And no sleeveless shirts" is correct.
Valet park and Emeril's will validate. No other restaurant does.