I want to know the answer to the following question:
Over what does the AVL  make rules governing?
All the background I'm provided with is that "The AVL, created by the Valencian parliament, is in charge of dictating the official rules governing the use of Valencian, and its standard is based on the Norms of Castelló (Normes de Castelló).". Is that enough to answer the question?
Answer: yes