On the liturgical memorial of St. Ignatius of Loyola, Pope Leo XIV signs the new Fundamental Law of the State of Vatican City, which enters into force immediately, fully replacing the one promulgated by Pope Francis on May 13, 2023: it is the fourth fundamental law of the Vatican State since 1929. The new text responds to the need to account for new governance requirements and significant regulatory changes that have occurred in recent years. Among the main innovations: the presidency of the Governorate is no longer reserved exclusively for Cardinals; the duties of the President are clarified — he ensures the governance of the State, issues the necessary directives for its general organization, coordinates the bodies of the Governorate, and may delegate functions to the Secretary General and Deputy Secretary General.