Others require the purchase of premium access to the site.

It's a plane that requires the purchase of, let us say, options.

To watch a film on disk, however, requires the purchase of a new player that will read the data for the television screen.

The applications should not require the purchase of additional products to be fully operational.

Deal with rights of the owner to require purchase of interests.

The initial program was free, however, many functions required the purchase of add-ons.

The free lite edition does not require the purchase of a license.

The company requiring minimum purchase that was often overwhelming to the dealers.

This could involve further costs as well, perhaps requiring the purchase of backup equipment or a support agreement.

Guild creation requires the purchase of an extended play package from the game store.