Spanish phrase
¿Cuáles son las reglas?
Meaning
What are the rules?
When to use it
This asks what rules to follow. It is a natural question about how a game or activity works.
Example dialogue
¿Cuáles son las reglas?
What are the rules?
Pon una carta del mismo color. Si no puedes, roba una.
Play a card of the same color. If you cannot, draw one.