UEFA said it wants the rules of soccer changed to protect players from concussions, after its own policy for dealing with head injuries came in for critism.
I think in this sentence, "to be" was omitted before "changed", so originally it has to be "it wants the rules of soccer to be changed"(,right?)
But I'm not sure when exactly I can omit "to be" in the sentence. For example, if the structure is Subject + "want" + Object + Object Complement, then can I always omit "to be"? As in,
I want it to be understood more.
I want it understood more.
Is this rule applied to other verbs as well?