Simplify the following text for a Grade 11 native English-speaking person.
Original: Protocol III of the CCW restricts the use of incendiary weapons ( not only napalm ) , but a number of states have not acceded to all of the protocols of the CCW .
Simplified: Protocol III of the CCW restricts the use of all incendiary weapons , but a number of states have not acceded to all of the protocols of the CCW .