The cancellation 24-hour rule for appointments states that if a person needs to cancel an appointment, they must do so at least 24 hours prior to the scheduled appointment time. This allows the service provider or the person conducting the appointment to reschedule the time slot with another client or manage their schedule accordingly.

Failing to cancel or reschedule within the 24-hour window may result in a fee (50% of treatment price) for the person who missed the appointment. This is because last-minute cancellations can be disruptive and cause inconvenience to the service provider or person conducting the appointment.