The 'Subject OK?' (yes/no) text comes from the instructor table in SPIRE. It means that the instructor is approved to teach this subject. If an instructor works for a particular department and is going to teach in another department, this must be approved by the Registrar’s Office and that approval is saved in SPIRE. If an instructor is teaching in a different department other than listed, the Registrar’s Office will add the instructor to the status page.