I want to know the answer to the following question:
The duties of its grades is an example of what historic documents?
All the background I'm provided with is that "Since the middle of the 19th century, Masonic historians have sought the origins of the movement in a series of similar documents known as the Old Charges, dating from the Regius Poem in about 1425 to the beginning of the 18th century.". Is that enough to answer the question?