 While no official knot exists for tying the two ends of the thong together , the decorative diamond knot has become the most common . When produced , the thong is joined by a simple overhand knot and various region specific traditions have arisen around tying the diamond knot , including : having a fellow course member tie it ; having a mentor or course leader tie it ; and having the recipient tie it after completing some additional activity that shows he or she has mastered the skills taught to him or her during training . 
