I want to know the answer to the following question:
Who established the Tibetan law code?
All the background I'm provided with is that "Yet Van Praag describes the distinct and long-lasting Tibetan law code established by the Phagmodru ruler Tai Situ Changchub Gyaltsen as one of many reforms to revive old Imperial Tibetan traditions.". Is that enough to answer the question?
Answer: yes