In the Joint PhD Program, when should I register for DOC 990 or DOC 995 and how many credits will I need?

Students will register for DOC 990 when they are taking their social work or social science prelims. They will register for 1-8 credit hours, depending on their need. DOC 995 is specifically for registration during the term the student plans to defend their dissertation, and they must register for 8 hours.