The citizens of Monaco are forbidden to enter the gaming rooms of the casino. The rule banning all Monegasques from gambling or working at the casino was an initiative of Princess Caroline, the de facto regent of Monaco, who amended the rules on moral grounds.

The citizens of Monaco are not allowed to gamble. However, only something like 21% (or 8,000 of the 38,000 residents) are citizens. As for why those 8,000 citizens are not permitted to gamble, a few sources stated it was a moral policy that dates back to the original establishment of casinos in the 1850s.