Thanks for the clarrification.
I'll echo Stefano's thoughts and say that referring to a previous section is generally helpful when the standard is being heavily modified (you don't want to update 10 places each time), but duplicating those rules once the standard moves to review seems like the right thing to do. From that point on, you don't expect the standard to ever change, so taking the time to duplicate the rules is hopefully a one-off and makes it easier for people like me to review and follow.
In this specific case, the fact that only one sentence (out of the 10 in the closure section) is being referred to, copying that one into the anon class section would make that section much clearer, for me at least.
Greg