What is the most appropriate HTTP status code for this message: "You must be 13 years or older to register"?

I am using the HTTP status code "403" for now but I want to know if there is a more appropriate HTTP status code.

{"status": 403,"message": {"en": "You must be 13 years or older to register.","es": "Debes tener 13 años o más para registrarte."   }}

I want to know if there is a more appropriate HTTP status code for this situation.