I want to know the answer to the following question:
What did the Nieszawa statues clarify?
All the background I'm provided with is that "In 1454 King Casimir IV granted the Nieszawa Statutes (Polish: "statuty cerkwicko-nieszawskie"), clarifying the legal basis of voivodship sejmiks (local parliaments).". Is that enough to answer the question?
Answer: yes