The first thing filmmakers must do if they are planning to feature children in the movie is to secure Child Performing Licenses. In order to avoid scheduling conflicts, the people in charge of the filming are urged to apply for these licenses well ahead of time as they can take around three weeks to be issued.
Working hours for child performers are not the same for legal adults. Production companies can check with the Education Welfare Service in their area to learn more about how long their child performers can stay on set. Typically, the working hours are determined by the age of the child.