These classes of vehicles will require substantial advances in technology.

Each class of 18 pilots requires at least 14 weeks for training.

This class is one year long and requires submission of art portfolios.

DS1 and some classes of data service may also require constant upstream bit rate.

At one point, the class required her to jump on a mini-trampoline.

Each class requires certain stats combined with specific skills in order to reach their effectiveness.

Each class requires a basic statistic score to follow its path.

This class requires occasional rehearsals outside of the school day.

In addition, some classes also require the use of a special item.

One class requires reading two hefty daily newspapers and analyses of the stock market.