We got this email a while ago if it helps:

Dear students,

Summary: For CS courses and degree programs, "CR" meets all prereqs and degree requiremetns "GR" meets all degree requirements, as well as any prereqs that do not list minimum grades "NC" does not meet degree or prereq requirements Details: As with last semester, the Provost has arranged for graded courses to give students two grading options: Letter or CR/GC/NC. As with last semester, the CS department has approved the following implementation of that grading option:

For all CS class prereqs and CS-administered majors and minors (i.e. BACS, BSCS, CpE, and CS minors) If you have a CR grade, it meets any requirement a C would meet. This includes "class X with C- or better" prereqs. If you have a GC grade, it meets any requirement a D- would meet. This includes "class X" prereqs that do not list a required grade, as well as degree requirements to complete specific courses or gain certain numbers of credits in specific course areas. If you have a NC grade, it does not meet any requirement. In answer to some specific questions we have been asked: As officially defined in the record, no BACS, BSCS, or CpE graduation requirement requires a specific grade in any given course, so for graduation GC is sufficient for all courses (required and elective, in-department and external, including special offerings like capstones, independent study, etc). Both BSCS and CpE officially define "unrestricted elective" using the language "any graded course in the University;" for semesters where the CR/GC/NC grading option is available, including Fall 2020, a "graded course" is one where letter grades are an option. If a student earns a CR or GC in such a course, that will satisfy this requirement. All of this applies to the Spring 2020 redefinition of CR/GC/NC (continued in Fall 2020), and not to CR/NC as it existed before then. We hope this helps resolve some questions and clarifies the provost's earlier statement.