The FSKA grading requirements for Godan, and Rokudan, factor in both a karate-ka's age, and previous experience. For those students under the age of 55 they are required to do the entire kihon, kata, and kumite requirements currently listed on the Yondan exam.
Students over the age of 55 may do the entire Yondan exam, but for them, only the katas specified in the exam are required to be performed. This is because after many decades of hard training, it is not unusual for students above the age of 55 to have sustained numerous injuries that may now limit their physical capabilities. In addition, these senior students are usually very well known to the examiner, from classes, courses, and their previous gradings.