diff --git a/05-onchain.md b/05-onchain.md
index 98c737926..d4e136078 100644
--- a/05-onchain.md
+++ b/05-onchain.md
@@ -143,12 +143,16 @@ A node:
       sufficient fee:
         - SHOULD use this fee to perform a *mutual close*.
       - otherwise:
-        - MUST use the *last commitment transaction*, for which it has a
+      	- if the node knows or assumes its channel state is outdated it
+      	  -  MUST NOT broadcast its *last commitment transaction*. 
+      	  -  SHOULD send an `error`.
+        - otherwise:
+          - MUST broadcast the *last commitment transaction*, for which it has a
         signature, to perform a *unilateral close*.
-      - MUST spend any `to_local_anchor` output, providing sufficient fees as incentive to include the commitment transaction in a block
+          - MUST spend any `to_local_anchor` output, providing sufficient fees as incentive to include the commitment transaction in a block
         Special care must be taken when spending to a third-party, because this re-introduces the vulnerability that was
         addressed by adding the CSV delay to the non-anchor outputs.
-	    - SHOULD use [replace-by-fee](https://github.com/bitcoin/bips/blob/master/bip-0125.mediawiki) or other mechanism on the spending transaction if it proves insufficient for timely inclusion in a block.
+          - SHOULD use [replace-by-fee](https://github.com/bitcoin/bips/blob/master/bip-0125.mediawiki) or other mechanism on the spending transaction if it proves insufficient for timely inclusion in a block.
 
 ## Rationale