Moral rights are inalienable.
The copyright owner, as well as their successors or assignees, may authorize the use of the work by third parties or assign economic rights, wholly or partially.
Granting an authorization to third parties in order for them to divulge, publish, use or explore the work does not imply the transfer of copyright rights.
Authorization shall only be granted in writing, mandatorily including the parties involved, the title and type of the work, the rights concerned, the duration, place and price conditions.
Please note that the assigns are only effective against third parties when registered.