diff --git a/draft-ietf-quic-transport.md b/draft-ietf-quic-transport.md
index e688a235f7..f11fcd0958 100644
--- a/draft-ietf-quic-transport.md
+++ b/draft-ietf-quic-transport.md
@@ -1709,6 +1709,17 @@ to any further incoming packets.
 The draining and closing periods do not apply when a stateless reset
 ({{stateless-reset}}) is sent.
 
+An endpoint is not expected to handle key updates when it is closing or
+draining.  A key update might prevent the endpoint from moving from the closing
+state to draining, but it otherwise has no impact.
+
+An endpoint could receive packets from a new source address, indicating a
+connection migration ({{migration}}), while in the closing period. An endpoint
+in the closing state MUST strictly limit the number of packets it sends to this
+new address as though the address were not validated (see {{migrate-validate}}).
+A server in the closing state MAY instead choose to discard packets received
+from a new source address.
+
 
 ### Idle Timeout