Previously established, there is a difference in meanings between authorship and copyright ownership, and there is an array of rights that belong to each. The script is written by its author (or co-authors), but the legal rights within the script (namely, the copyright ownership) may belong to someone else. Simply put, when you write an original script, you have authorship rights and own the copyright in that script. However, copyright is a property right, therefore it is transmissible by either assignment or licence. An assignment of copyright transfers ownership of the written material to others, but this may only be permitted by the first owner. The UK law presumes the first owner of the copyright work to be the person who created it. Separately, a licence creates a contractual agreement whereby ownership is retained, but the work can be used subject to the specific terms of the licence. For example, a writer may give permission to a production company either through an assignment of rights or licence to make the script into a film. Once the film is made, the writer is renumerated the purchase price for the script, which is paid in order to secure the film rights, establishing a chain of title.