Regulated takeoff weight

In many situations an aircraft may not be permitted to take-off at its maximum takeoff weight (MTOW), In these situations the maximum weight permitted for takeoff will be depending on different factors (e.g. Flap setting, Airfield altitude (height above sea-level), Air temperature, Length of runway), RTOW or maximum permissible takeoff weight varies for each takeoff. It can never be higher than MTOW.