Gradings are held periodically throughout the year when there are enough students ready to grade.
Students are selected to grade based on their increased skill and knowledge during the period since they commenced training / their last grading and their attendance and level of effort.
It takes approximately 6 to 10 years to obtain a black belt with RMAA depending on the age, skill and commitment of the student. RMAA does not have 'junior' and 'senior' black belts. The requirements to obtain a black belt are the same for those under and over 18.