What government policy did the villagers have to enforce in the book The Devil's Arithmetic?

In "The Devil's Arithmetic," the villagers had to enforce the policy of observing the Jewish tradition of Passover, which involves the retelling of the story of the Exodus and the importance of remembering their heritage. This practice serves to strengthen their identity and unity as a community. The story highlights the significance of remembering the past in the face of future adversity.