What type of hat shall be allowed?W

What type of hat shall be allowed?

While California law gives students the right to wear a hat outdoors at school, schools retain the discretion to determine the type of hat. Whatever policy the school adopts, the goal should be the wearing of a hat by most or all students and personnel.

Policy Options:

Students may procure/wear any hat or visor that provides reasonable sun protection.
Hats meeting certain design criteria (as defined by the school or district) are allowed.
Certain types of hat (definition supplied) are not allowed.
Only specific hat(s), that the school or district provides for sale or to be ordered, are allowed.