Samsung PL64E8000GFXZP - Manual (Page 182)

N The rating categories are also
grouped so that clicking one
category blocks all the categories
a parent would block along with it.
For example, if you block the 8 ans+
category, then 13 ans+ , 16 ans+ and
18 ans+ will automatically be blocked
also.
N To unblock a category, click the lock
icon.
Downloadable U.S. Rating : Parental