Abstract: A system for administering the distribution of digitally distributable works, comprises an encapsulation facility operable to encapsulate a digitally distributable work with predetermined conditions of use to create an encapsulated work, and distribution means for distributing the encapsulated work from a transferor in possession thereof, to a transferee. The encapsulated work has a state which is alterable between an enabled state in which the digitally distributable work is unconditionally enabled for use, and a disabled state in which the digitally distributable work is disabled for use. The system also has a switching means operable to switch the state of the encapsulated work to be in the disabled state upon transfer of the digitally distributable work form the transferor to a transferee, and to be in the enabled state when the predetermined conditions of use are complied with by the transferee.