The Latin Rule was specific codes for the Templar Order. Its 72 clauses defined the ideal behaviour for the Knights, such as the types of garments they were to wear and how to eat. As the Order grew, more guidelines were added, and the original list of 72 clauses was expanded to several hundred in its final form. Some of my family were these knights.
One of many, many variations of the Medieval Knights Code Of Chivalry. No one region, kingdom or country had a unified code, although they did share various aspects between them. The "Rule" of the Knights Templar had 76 parts. Where the one in this image has 17, and I have seen some with as few as seven.