Nevada’s gambling regulators have ordered all table game players to wear COVID-19 masks if their presence isn’t physically separated from one another.

On Wednesday, the Nevada Gaming Control Board revised its health and safety policies for casinos that are reopening following their lengthy pandemic-related closure. The change comes after Nevada reported an unprecedented number of new COVID-19 cases, just two weeks after the casinos were allowed to reopen.

Casinos now “must require patrons to wear face coverings at table and card games if there is no barrier, partition, or shield between the dealer and each player.” The requirement applies equally to table/card players and spectators, and anyone else within six feet of the gaming position.

While casinos have encouraged guests to wear masks and are required to provide free masks to guests who request them, anecdotal reports suggest an extremely small minority of gamblers are opting to actually wear the things. This is despite evidence that widespread mask use is an effective means of limiting COVID-19 transmission.