-node, it MAY signal Intercept.forward.
-
-If CollectionC receives a data packet that a different node
-is supposed to forward, it MAY signal Snoop.receive.
+node, it MAY signal Intercept.forward. CollectionC MAY signal
+Snoop.receive when it hears a packet which a different node is
+supposed to forward. For any given packet it receives, CollectionC
+MUST NOT signal more than one of the Snoop.receive and
+Intercept.forward events.