Copyright in the artwork applied to the age of 50 years since the creation of jobs. But if the job has been advertised, there are 50 years of age, since the copyright has been advertised for the first time.
Copyright in a work of art for 50 years from the application to the authorship is up. But if the work is published, copyright for 50 years after it was first advertised.
Copyright in a work of art is applied to 50 years since have creative work. But if the advertisement that copyright is 50 years since are advertising for the first time.