(1) Where the author grants to another a right of use in a work, then, in cases of doubt, the author retains the right to consent to the publication or exploitation of an adaptation of the work.
(2) Where the author grants to another a right of use in the reproduction of the work, then, in cases of doubt, the author retains the right to transfer the work to video and audio recording mediums.
(3) Where the author grants to another a right of use in a communication of the work to the public, then, in cases of doubt, the author is not entitled to make the communication perceivable to the public by means of a screen, loudspeaker or similar technical devices outside of the event for which it is to be used.