For a comprehensive summary of the changes, please see:
Current status of Chicago 17th Edition for the following referencing management tools:
The Chicago Manual of Style, 17th Edition - Notes & Bibliography (or Chicago Footnotes) is a citation system commonly used across the Schools of Philosophy & Theology and Arts & Sciences.
Within Arts & Sciences, the style is used in the following disciplines: English Literature, Greek Studies, History, and Theatre Studies. It may also be used in Aboriginal Studies, Politics, Social Justice and Sociology.