@Jacob B. posted:
I hope I'm understanding what you've said above. I'd like to give a few examples to see if I've got this.
I believe this is a normal nonrestrictive relative clause modifying a noun phrase:
(A) The current order states that the parties must follow the agreement signed on 3/24/21, which states that the parties shall share custody.
I believe this is a sentential relative clause modifying a verb phrase:
(B) The father punched the mother in the face, which resulted in the mother sustaining bruising.
Yes, Jacob, you have understood correctly.