Exposcit Debitum (Latin for The Duty requires) is the title of the Papal bull (or 'Apostolic Letter') that gave a second and final approval to the foundation of the Society of Jesus (the Jesuits). It was issued by Pope Julius III on 21 July 1550. It replaced Regimini militantis Ecclesiae of 1540. The structure of the text is the same but, based on 10 years experience, some modifications were introduced: Exposcit Debitum is still the referential papal document, a sort of foundational chart, for whatever deliberation takes place on the identity and mission of the Jesuits in the world of today.