At its annual planning retreat in June 2017, the University of California Council of University Librarians (CoUL) discussed the UC Libraries Direction and Oversight Committee (DOC) report on the Future of Resource Sharing (June 9, 2017) and the report of the Shared Regional Library Facility ILS Six Month Exploration Period (June 12, 2017). Together these reports made a compelling case for a more thorough exploration of a systemwide or consortial Integrated Library System (ILS) for the UC Libraries.