In our opinion, the authors are, first of all, people. Moreover, the act states that they are persons, not organizations. They are persons who create the document. In our opinion, the two main authors are the director and the screenwriter. Our view is entirely the same as that of the Writers Guild of Canada. We share the same opinion.
Certain arrangements have been made in other countries. In fact, anyone who makes the slightest contribution to the making of a film takes part in its creation. However, you also have to consider the people who have an effect on the work as a whole. Who has an effect on the work as a whole? That's definitely the director and the screenwriter. Then there is research to be done. The director and screenwriter absolutely have to be considered. They alone can be considered as authors.