Not every low-cost carrier implements all of the above points. For example, some try to differentiate themselves with allocated seating, while others operate more than one aircraft type, still others have relatively high operating costs but lower fares. JetBlue, for instance, has in-flight entertainment in every passenger seat. Other airlines are limited on what points they can implement based on local laws. For example, Ryanair cannot remove window blinds from its aircraft, as they are required by the Irish Aviation Authority. As supply increases, this sort of differentiation by brand is an important criteria for the future success of low-cost carriers, since many experts believe price competition alone is not enough, given the number of carriers.