This study has made an extensive comparison of the various versions belonging to different Buddhist sects in Sanskrit, Pali, Chinese and Tibetan languages. As a sequel it reveals how in a period of several centuries this code had expanded from 218 rulles of the Mahasanghikas to 263 of the Sarvastivadins. Viewing the text from the historical perspective one may better understand the significance of the legal, social and religious life of the Buddhist Sangha.